题目内容

平衡是指物体相对于地面保持(),或匀速()运动的状态。

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While mother _______ some washing, I _____ a kite for Kate.

A. did, made
B. was doing, made
C. was doing, was making
D. did, was making

自我认同感包括时间上的连续性和空间上的一致性。()

A. 对
B. 错

“_______ you angry then?” “they ______ too much noise.”

A. are, were making
B. were, were making
C. are, made
D. were, made

画单个构件受力图时,应先取出构件作为。

A. 分离体
B. 总体

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