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- 1995 views
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- 2763 views
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- 2120 views
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当图中这个人按图示方向拉动绳子时,经过若 …
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- 1524 views
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右下角的小丑正在拉绳子,对于挂在绳子上的 …
- 1472 views
- 1 answers
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- 1678 views
- 2 answers
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如图所示,当这名男子转动控制杆时,哪两个 …
- 1428 views
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- 1386 views
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- 2012 views
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- 2386 views
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- 3064 views
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在这个杠杆和滚轴系统中,黑色的点代表的是 …
- 2670 views
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- 2528 views
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- 2463 views
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- 2501 views
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- 2709 views
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仔细观察一下这幅图,如果手柄按图纸所示方 …
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