一大水池的下方开一非常小的小孔放水，水深为h2，小孔到水面的高度为h1，则液体从小孔流出的流速为（ ）。
A: 其余结果都不对
B:
C:
D:
A: 其余结果都不对
B:
C:
D:
举一反三
- 下列外螺纹的画法正确的的是（） A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/00dc3ab97a48441e8ead8e77274beb59.png" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/de6a28aa41134b4d9e096f3578be1b07.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/ddd26f1ab38a4523abb1ab19e01dd567.png" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/6ca5035498e44dbd88e96dc4808213cc.png" />
- 84.下列内螺纹的画法正确的是（ ） A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/c33cfc2d422941cca9f579dfe742a78b.png" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/160e85a31258446c8b4ac1d41fce87dd.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/b5f4789658934fdfb893570376769a7c.png" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/46f802e16e8d48f19c06acb8687c5d17.png" />
- 以下哪个家具是翘头案。( ) A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/0dc8080097f94341851751cd492ad0f5.png"> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/e33f20662f944e6e90066e57cb72de23.png"> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/6bb23062cf8e486584f2516489d235f1.png"> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/2d207e48c3ae458295064a1661f33699.png">
- 以下哪个家具是四出头官帽椅（ ）。 A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/cf35333886264e06943d71abc58500e2.png"> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/da7daee378fe4462be443d6b742c8b86.png"> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/f1689ee0c507447d9555b9d701df80ee.png"> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202110/f0c3c42ac10b42059153053472cd55ec.png">
- <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/c3b75de7a0ff4216a7c936dfa863e921.PNG" /> A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/9bc090082ac447aab731646e7ce4a372.PNG" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/5666843a7db64c75a2ec586b2db2f35f.PNG" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/fd98481c51284a9db6d3c21bd7fa60ca.PNG" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/6f7725736cf84d439343d0c213a650e7.PNG" />