题目

A.The Student Union. B.The Tutoring Service Center.C.Her professor's office. D.Her tutor's home. 答案：【答案】B【解析】【原文】W: I’m having a lot of trouble with logic and it seems my professor can't explain it in a way that makes sense to me.M: You know, there's a tutoring service on campus organized by the Student Union. I was about to drop advanced mathematics before they helped me out.Q: Where will the woman probably go next?12．已知神舟九号飞船在距地面高度为h的圆形轨道绕地球飞行．地球半径R，表面处的重力加速度为g．（1）用以上数据求出第一宇宙速度．（2）神舟九号飞船在上述圆轨道上运行的角速度和周期．