据报道,我国自主研制的“嫦娥二号”探月飞行器环月飞行的高度距

据报道,我国自主研制的“嫦娥二号”探月飞行器环月飞行的高度距离月球表面100km,“嫦娥三号”探月飞行器落月制动前环月飞行的高度约为15km,若它们环月运行时均可视为圆周运动,则

A.“嫦娥三号”环月运行的周期比“嫦娥二号”长

B.“嫦娥三号”环月运行的速度比“嫦娥二号”大

C.“嫦娥三号”环月运行时向心加速度比“嫦娥二号”大

D.“嫦娥三号”环月运行时角速度比“嫦娥二号”小

答案

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