20春学期《现代材料测试技术》在线平时作业1

adminhan

<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">能谱仪的分辨率比波谱仪（</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p><p style="LINE-HEIGHT: 150%; TEXT-INDENT: 66pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 5.5; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span></p>
A:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">高</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US">&nbsp;</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span></p>
B:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">低</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span></p>
C:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">相同<span lang="EN-US"><o:p></o:p></span></span></p>

<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">在入射电子束作用下被轰击出来并离开样品表面的样品的核外电子叫做（</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p><p style="LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 0pt; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></p>
A:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">二次电子<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></span></p>
B:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">背散射电子<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span></p>
C:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">俄歇电子</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; mso-char-indent-count: 2.0; mso-pagination: widow-orphan"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">射线衍射时滤波的目的是</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">(</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"> )</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">。<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 54pt; LINE-HEIGHT: 150%; mso-char-indent-count: 4.5; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt"></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; mso-char-indent-count: 2.0; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">避免荧光辐射</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span></p>
B:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; mso-char-indent-count: 2.0; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">获得</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">K</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">系单色</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span></p>
C:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; mso-char-indent-count: 2.0; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">防止光电效应</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"><o:p></o:p></span></p>

<p style="TEXT-ALIGN: left; LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal" align="left"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">在</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US">debye</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">照相法中，不受底片收缩影响的底片安装方法是（</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"> <o:p></o:p></span></p><p style="TEXT-ALIGN: left; LINE-HEIGHT: 150%; TEXT-INDENT: 60pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 5.0; mso-pagination: widow-orphan" class="MsoNormal" align="left"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt"></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p>
A:<p style="TEXT-ALIGN: left; LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal" align="left"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">正装</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;<span style="mso-spacerun: yes">&nbsp;</span></font></span></p>
B:<p style="TEXT-ALIGN: left; LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal" align="left"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">反装<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span></span></p>
C:<p style="TEXT-ALIGN: left; LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal" align="left"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">不对称</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 150%; mso-char-indent-count: 2.0; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">物质对</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">X</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">射线的吸收主要是由（<span lang="EN-US">&nbsp;</span></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"> </span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）引起的。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"><o:p></o:p></span></p>
A:<span style="FONT-SIZE: 12pt; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">散射<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-fareast-font-family: 楷体_GB2312; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">&nbsp;&nbsp;</span>
B:<span style="FONT-SIZE: 12pt; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">热效应</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-fareast-font-family: 楷体_GB2312; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">&nbsp;<span style="mso-spacerun: yes">&nbsp; </span></span>
C:<span style="FONT-SIZE: 12pt; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">光电效应</span>

<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">在透射电镜中称为衬度光阑的是（</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p><p style="LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 0pt; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span></p>
A:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">聚光镜光阑</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;<span style="mso-spacerun: yes">&nbsp;&nbsp;</span>&nbsp;</font></span></p>
B:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">物镜光阑<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span></span></p>
C:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">选区光阑</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p>

<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">入射电子波在样品中振荡的深度周期叫做（</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p><p style="LINE-HEIGHT: 150%; MARGIN: 0cm 0cm 0pt; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></p>
A:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">衍射衬度</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;<span style="mso-spacerun: yes">&nbsp;&nbsp;</span>&nbsp;</font></span></p>
B:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">消光距离</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;<span style="mso-spacerun: yes">&nbsp;&nbsp;</span>&nbsp;&nbsp;</font></span></p>
C:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">偏离矢量</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p>

<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">电子枪中给电子加速的称为（</span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;&nbsp;</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p><p style="LINE-HEIGHT: 150%; TEXT-INDENT: 102pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 8.5; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span></p>
A:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">阳极<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><span style="LINE-HEIGHT: 150%; FONT-SIZE: 12pt; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312" lang="EN-US"><font face="Times New Roman">&nbsp;</font></span></p>
B:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">阴极<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></p>
C:<p style="LINE-HEIGHT: 150%; TEXT-INDENT: 24pt; MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 2.0; mso-pagination: widow-orphan" class="MsoNormal"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">栅极</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-font-kerning: 0pt" lang="EN-US"><o:p></o:p></span></p>

&nbsp; <span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">透射电镜的两种主要功能是检测（<span lang="EN-US">&nbsp; </span>）。</span>
A:<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">表面形貌和晶体结构</span>
B:<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">内部组织和晶体结构</span>
C:<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">表面形貌和内部组织</span>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; mso-pagination: widow-orphan"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">据</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">Ewald</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">图解可知，满足衍射条件的晶面倒易点阵，必落在半径为（</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"> </span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">）的反射球面上。</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"><o:p></o:p></span></p>
A:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; mso-pagination: widow-orphan"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"> 1/</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">入</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;</font></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"><span style="mso-spacerun: yes">&nbsp;</span></span></p>
B:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; mso-pagination: widow-orphan"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">&nbsp;</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">2/</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">入<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"> <o:p></o:p></span></p>
C:<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 150%; mso-pagination: widow-orphan"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt">&nbsp;1/2</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; mso-font-kerning: 0pt; mso-fareast-font-family: 楷体_GB2312"><font face="Times New Roman">&nbsp;</font></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-hansi-font-family: 宋体; mso-font-kerning: 0pt">入</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 0pt"> <o:p></o:p></span></p>

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">电子衍射和<span lang="EN-US">X</span>射线衍射一样必须严格符合布拉格方程。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">布拉格方程的物理意义是指原子面对<span lang="EN-US">X</span>射线的反射并不是任意的，只有当&lambda;、&theta;和<span lang="EN-US">d</span>三者之间满足此方程时才能发生反射。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">当<span lang="EN-US">X</span>射线管电压低于临界电压时仅可以产生连续<span lang="EN-US">X</span>射线；当<span lang="EN-US">X</span>射线管电压超过临界电压就可以产生特征<span lang="EN-US">X</span>射线和连续<span lang="EN-US">X</span>射线。</span>
A:错误
B:正确

<a name="OLE_LINK4"></a><a name="OLE_LINK3"><span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt"><span style="mso-bookmark: OLE_LINK4"><font color="#000000">扫描电镜二次电子像</font></span></span></a><span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt">的分辨率比背散射电子像更高。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt">当</span><span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt" lang="EN-US">X</span><span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt">射线照射在一个晶体时，产生衍射的必要和充分条件是必须</span><span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt">满足布拉格方程。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">经滤波后的<span style="mso-bidi-font-weight: bold" lang="EN-US">X</span><span style="mso-bidi-font-weight: bold">射线</span>是相对的单色光。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 12.0pt">透镜的数值孔径与折射率有关。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">扫描电镜的衬度和透射电镜一样取决于质厚衬度和衍射衬度。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">体心立方点阵的系统消光规律是当<span lang="EN-US"> H</span>、<span lang="EN-US">k</span>、<span lang="EN-US">L</span>全为奇数或全为偶数时才出现反射。</span>
A:错误
B:正确

<span style="FONT-FAMILY: 楷体_GB2312; FONT-SIZE: 12pt; mso-hansi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">激发限与吸收限是一回事<span lang="EN-US">,</span>只是从不同角度看问题。</span>
A:错误
B:正确