“神舟”号飞船发射成功，中国人的“登月梦”指日可待．已知月球上的物体被月球吸引也受到“重力”作用，月球上物体的“重力”与其质量是否成正比呢？假如你是一名航天员，驾驶飞船到达月球，请对此问题进行探究．
史料一：中共八大对中国自己的建设社会主义道路的探索，毕竟取得了初步成果，历史证明这些成果对于党的事业的发展有长远的重要意义。
史料二：
将闭合多匝线圈置于仅随时间变化的磁场中，线圈平面与磁场方向垂直，关于线圈中产生的感应电动势和感应电流，下列表述正确的是( )
A. Were you tall before?
B. Who's the little boy?
C. Hi，Mike!
D．Can you go cycling now?
E. Could you ride a bike at that time?
Mike: Hello, John!
John: ____
Mike: Come and look at my old photos.
Mike: It's me!
Mike: No, I was very short and fat.
Mike: No, I couldn't. But l liked bikes at that time. That was my father's bike.
