如图1-70所示,在倾角θ的斜面上,有一个质量为m的均匀光滑球,小球被竖直挡板挡

题型:填空题

问题:

如图1-70所示,在倾角θ的斜面上,有一个质量为m的均匀光滑球,小球被竖直挡板挡住,则球对斜面的压力等于______.

考点:共点力的平衡
题型:填空题

句型转换。

1. We call it a kid. (就划线部分提问) 

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2. Those are shops. (就划线部分提问)

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3. I have one maths lesson on Monday. (就划线部分提问) 

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4. They are elephants. (单数) 

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5. Is that little bird nice? (肯定句)

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6. There are some balloons in the classroom. (一般疑问句) 

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7. There is some water in the bottle. (否定句) 

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8. Please read English now. (否定句) 

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9. I am ill today. (一般疑问句) 

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10. We often go to the park on Monday. (一般疑问句)

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题型:填空题

做匀加速直线运动的物体,速度从v增加到2v时经过的位移是s,则它的速度从2v增加到4v时所发生的位移是多大?

题型:填空题

2型糖尿病患者胰岛素分泌的特点是()

题型:填空题

仙鹤草来源于()

A.桑寄生科

B.三白草科

C.蔷薇科

D.唇形科

E.豆科

题型:填空题

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A、不明原因的磁条消磁

B、103卡换银联卡

C、卡片磨损

D、磁道锁定换卡

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