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2浪费
3喜爱
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- 1当二个力f1.f2角度不变时,其中一个力增大,合力是否增大.要证明过程.
- 2we are both students/we both are students都对?
- 3i don't have time to think about what it is!改为同义
- 4改错:Look at that!It's an UFO.
- 5“春去花不语,春来花还发.不信花有信,红影满风沙.”这首诗的意思及含义?
- 6请问余弦公式是什么
- 7判断n²+n(n为整数)是奇数还是偶数
- 8I could not do my homework with all that noise< >
- 9有关硫酸的电离方程式
- 10i am a member of my family.对么?