20春学期《多媒体技术基础》在线平时作业3

adminhan

<font face="Arial">&nbsp;世界上第一台多媒体计算机系统由（&nbsp;&nbsp; ）研制推出。 <br />A&nbsp;B&nbsp;&nbsp;&nbsp;C&nbsp;D </font>
A:&nbsp;美国&nbsp;
B:日本
C:&nbsp;英国&nbsp;
D:&nbsp;中国

<font face="Arial">&nbsp;各种音乐、文本、图形、静止和运动的图像属于（&nbsp;&nbsp; ）媒体。</font>
A:<font face="Arial">感觉媒体&nbsp;&nbsp;</font>
B:表示媒体
C:表现媒体
D:存储媒体

<p class="MsoNormal"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果希望制作一个三角形旋转的</span><span lang="EN-US">Flash</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">动画，应该采用（</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）动画技术。</span></p>
A:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'">逐帧</span>
B:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'">遮罩</span>
C:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'">移动补间</span>
D:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'">形状补间</span>

<div>在Flash中使用椭圆工具画一个圆形时，需要按住键盘的（<span>&nbsp;&nbsp; </span>）键并与鼠标配合才能画出圆形。</div>
A:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Shift<span style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>
B:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Ctrl</span>
C:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Alt</span>
D:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">Tab</span>

<font face="Arial">人耳可听到的声音又叫音频，其声波的频率范围为（&nbsp; ）。<br />&nbsp;</font>
A:20～2kHz&nbsp;&nbsp;
B:200～20kHz&nbsp;&nbsp;
C:20～20kHz&nbsp;&nbsp;
D:0~20kHz

<font face="Arial">&nbsp;一般认为，多媒体技术研究的兴起从（&nbsp;&nbsp; ）开始。<br /></font>
A:1972年，philips展示播放电视节目的激光视盘。<br />
B:1984年，美国Apple公司推出Macintosh系列机。<br />
C:1986年，philips和sony公司宣布发明了交互式光盘系列CD-I。<br />
D:1987年，美国RCA公司展示了交互式数字影视系统DVI。

<font face="Arial">&nbsp;响度是人耳对声音强弱的感觉程度。响度不仅与声压有关，还与频率有关。</font>
A:错误
B:正确

<font face="Arial">在Photoshop中，可以将&ldquo;背景&rdquo;图层转换为常规图层。</font>
A:错误
B:正确

<font face="Arial">&nbsp;心理视觉研究表明如果场频大于50次/秒，人眼就感觉不到闪烁。</font>
A:错误
B:正确

<font face="Arial">&nbsp;对所有制式的电视信号，每一扫描行的有效样本数均为720个。</font>
A:错误
B:正确

<font face="Arial">使用Adobe Audition可以编辑MIDI格式音乐文件。</font>
A:错误
B:正确

<font face="Arial">&nbsp;视频编辑中非线性编辑的素材或其中的一部分可以随时被观看、修改和编辑。</font>
A:错误
B:正确

<font face="Arial">在Photoshop中，磁性套索工具可自拖动鼠标过程中自动捕捉图像中物体的边缘以形成选区。在磁性套索工具的工具选项栏中的&ldquo;宽度&rdquo;越小、&ldquo;边对比度&rdquo;越高，得到的选择范围越准确。</font>
A:错误
B:正确

<font face="Arial">可以之用Premiere为影片添加字幕。</font>
A:错误
B:正确