流体运动粘度v的量纲是( )。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/6ba52cc0037d454aae5499e942e8c40c.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/389803a418394b09a61bcbe7861b0ef8.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/6ff59473ff7d475887d5e18dec32f15c.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/34ebc629c74a431bb5c03df0f1dcb656.png" />

在体积V内理想气体的配分函数是（） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/f06f3edbc1e2490db16ddf913dd8567e.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/f3bd5d2ed5784896920511b072867fb2.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/daf559fcf21a48b584a41773e83704ef.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/50e30867ae3f46e2b36a482a15bc0c39.png" />

如图所示电路的等效电阻为https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/5891c12dc8674117b7205221cd77961f.png

对称三相电路的有功功率的计算公式正确的是( )。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/a26c625ab73e42f5a78b8508196d5a9b.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/2f416caa47f14f75800e6075973d66bc.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/d292883b6acf4df68954eceddbc4e7fd.png" />

体系处于<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/7bae90aad0f0442d9d6adf4ff4c69c2c.png" />状态,则体系的动量取值为 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/156065cb1de5431a9a2ea0b029f26f79.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/627120343f054317828addfe01200e5b.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/09f88938fc6f43a0819284117c0b14fa.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/2311487532fb45c789f7dce939291db1.png" />