题目

“嫦娥一号”和“嫦娥二号”绕月飞行器的运行轨道可近似为圆形轨道，距月球表面高度分别为和，运动的向心加速度分别是和，运动周期分别为和。已知月球半径为R，则和的比值及T1和T2的比值分别为 A．，   B、，  C ．，  D、， 答案：B，根据句意和汉语提示，在答题卡上写出所缺单词的正确形式。【1】My friend Sonia_____(有) many good habits.【2】Mother’s Day is on the_____(第二个) Sunday in May.【3】I have a good eating habit. I like ____(西红柿) very much.【4】Sui Ning is in the _____(中间的) of Sichuan Province.【5】Gina is untidy. Her books are _____(到处).