问题
选择题
我国于2007年10月24日成功发射了“嫦娥一号”探月卫星．若卫星在半径为
的绕月圆形轨道上运行的周期
，则其线速度大小是
A．
B．
C．
D．
答案
答案：B
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我国于2007年10月24日成功发射了“嫦娥一号”探月卫星．若卫星在半径为的绕月圆形轨道上运行的周期，则其线速度大小是
A．
B．
C．
D．
答案：B
| 完型填空。 | ||||
| Mrs. White 1 in a school. It is Sunday. She has 2 classes. At eight in the morning, she 3 to a shop and buys a nice dress. She puts it in her bag and then buys 4 cakes for her children. At eleven she 5 home. She wants to put on her new dress, but she 6 find her bag. She calls the shop assistant (售货员), "Hello, Mrs. Black. This is Mrs. White. Can you help 7 find my bag?__8__in your shop." "Of course, Mrs. White," says the assistant. "We found three bags here. But which one is 9 ?" "I'm 10 ," says Mrs. White, "I can tell you which one is mine." | ||||
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