On his 10th birthday, Marty manages to e

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问题选择题

On his 10th birthday, Marty manages to escape from the zoo and gets onto the subway, _____ he believes

that he can go to the wild.[ ]

A. which

B. from what

C. through which

D. that

答案

答案：C

选择题

It’s incredible that you made ______ mistake alike for ______ third time. How can you be so forgetful?

A．a; a

B．a ; /

C．the ; the

D．the ; /

问答题

（1）力使物体获得的加速度

（2）用平行四边形作图法求出物体所受的合力（在图中保留作图的痕迹）

（3）力对物体做的功