问题
单项选择题
液压缸单位面积所承受的作用力p=（）。
A、A/F
B、F/A
C、F²A
D、F+A
答案
参考答案：B
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液压缸单位面积所承受的作用力p=（）。
A、A/F
B、F/A
C、F²A
D、F+A
参考答案：B
| 用所给选项补全对话。 | |
| W: 1________ M: I want to be a doctor. W: A doctor? 2________ M: Because it's interesting and I'll be very happy when my patients are well. W: Do you think it's easy to heal people? M: No, I don't think so. It's hard work and there are a lot of things to learn. W: 3_______ M: My mother is a doctor and she works very hard. W: Are you sure you can be a good doctor? M: Yes, I'm quite sure. I'll go to college and do my best to learn a lot about medicine. W: 4_______ M: Chinese Medicine. I like it. W: You're great. 5_______ M: Next week. W: Keep trying! M: Thank you very much.
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