试题与答案

“嫦娥一号”探月卫星沿地月转移轨道到达月球,在距月球表面200 km的P点进行第

题型:不定项选择

题目:

“嫦娥一号”探月卫星沿地月转移轨道到达月球,在距月球表面200 km的P点进行第一次“刹车制动”后被月球捕获,进入椭圆轨道I绕月飞行,如图所示。之后,卫星在P点经过几次“刹车制动”,最终在距月球表面200 km的圆形轨道Ⅲ上绕月球做匀速圆周运动。用T1、T2、T3分别表示卫星在椭圆轨道I、Ⅱ和圆形轨道Ⅲ上运动的周期,用a1、a2、a3分别表示卫星沿三个轨道运动到P点的加速度,则下面说法正确的是

[ ]

A.a1<a2<a3

B.T1<T2<T3

C.T1>T2>T3

D.a1>a2>a3

答案:

答案:C

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