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 ______不是压强单位
A:<img class="kfformula" src="data:image/png;base64,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" data-latex="N/{m}^{2}">
B:Pa
C:kN/m
D:mm汞柱
<input type="text" value="1" disabled="" style="text-align: center; width: 50px; margin: 0 10px; background: transparent; padding: 0 10px; border: 0; border-bottom: 1px solid #000;">常用来测量管道中流量点流速。
A:毕托管
B:文丘里流量计
C:测压管
D:薄壁堰
水流在运动过程中克服水流阻力而消耗能量称为水头损失。其中<input type="text" value="1" disabled="" style="text-align: center; width: 50px; margin: 0 10px; background: transparent; padding: 0 10px; border: 0; border-bottom: 1px solid #000;">是产生水头损失的外因。
A:边界对水流的阻力
B:液体的黏滞性
C:重力对水流的作用
D:液体毛细作用
元流单位重量液体从断面1流到断面2克服阻力消耗的能量,称为
A:位置水头
B:压强水头
C:测压管水头
D:水头损失
堰的水流运动特征为
A:共同的水力特征为上游水位壅高过堰时水面跌落
B:共同的水力特征为下游水位壅高过堰时水面跌落
C:共同的水力特征为上游水位壅高过堰时水面发生水击
D:共同的水力特征为下游水位壅高过堰时水面发生水击
水力学包含两部分水静力学和水动力学。
A:对
B:错
等压面可以是平面,也可以是曲面。<br><br>
A:对
B:错
固体具有惯性,液体和气体不具有惯性。()
A:错误
B:正确
均质连续静止液体内任何一点的测压管水头等于常数。<br><br>
A:对
B:错
牛顿内摩擦定律适用于所有的液体。
A:对
B:错
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