问题
填空题
流体在______上的作用力称为单位压力。
答案
参考答案：单位面积
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流体在______上的作用力称为单位压力。
参考答案：单位面积
| 单句改错，找出每句中的一处错误并改正。 | |
| 1. How much is these black pants? __________________________ 2. Do you need bags for sports and school? __________________________ 3. We have a school trip on April. __________________________ 4. —Let's go to the movies. —Sure. That sound interesting. __________________________ 5. September is the nineth month of the year. __________________________ |