问题
单项选择题
流体的流量愈大，在节流装置后产生的（）也就愈大.
A.压差
B.压力
C.真空度
D.负压
答案
参考答案：A
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流体的流量愈大，在节流装置后产生的（）也就愈大.
A.压差
B.压力
C.真空度
D.负压
参考答案：A
| 根据句意选择单词或短语，并用适当形式填空。 | |
2. We will make every effort to ___________ our motherland. 3. Before you make a speech, you should prepare for it ___________ and plan what to say. 4. Do you know who ___________ the film Charlie Chaplin? 5. He was really ___________ when he was abroad studying for his degree. 6. Everybody is created equal and ___________. 7. She has got a good job and has got married, so she is rather ___________ her life now. 8. When she ___________, she found herself lying in bed in a hospital. 9. She could easily ____________ her children from the crowd. 10. She was too nervous when she first came here. I could hardly put her ___________ at that time. |