汽车在直线行驶时，车身是属于______现象，汽车的轮子是属于____

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问题填空题

汽车在直线行驶时，车身是属于______现象，汽车的轮子是属于______现象．

答案

汽车在直线行驶时，车身是属于平移现象，汽车的轮子是属于旋转现象．

故答案为：平移、旋转．

单项选择题

Annie Jump Cannon, ________ discovered so many stars that she was called "the census taker of the sky".

A．a leading astronomer,

B．who, as a leading astronomer,

C．was a leading astronomer,

D．a leading astronomer who

问答题简答题

水在土工以哪三种状态存在。