题目

一辆汽车以10m/s的初速度在水平地面上匀减速滑动,加速度大小为2m/s2,.求：（1）汽车在6秒内的位移大小。（2）汽车在最后1s内的平均速度的大小。  答案：（1）25m （6分）  （2）1m/s  （6分）解析:略 Mary is an American schoolgirl. She is now in Beijing with her parents. She doesn't know Chinese, but she is trying to study and speak it. She often tries to speak Chinese to her Chinese friends. Sometimes they don't understand her, because she can't speak Chinese well.　　It's Saturday morning. Mary goes out. She is on her way to the park. She is going there to see a flower show . But she doesn't know how to get there. She asks a Chinese boy. The boy can't understand her. Then she takes out a pen and some paper. She draws flowers on it, gives the picture to the boy and says something about it. The boy smiles and then shows Mary the way to the park.小题1:Where does Mary live now? She lives in ____.A．AmericaB．EnglandC．China 　D．Canada小题2:She can speak ____ Chinese.A．muchB．a littleC．littleD．a few小题3:She likes ____ Chinese with her ____.A．speak, parents 　 　　B．speaking, friendsC．speaks, girl-friends 　D．speaking, teachers小题4:Where is she going?A．To a new school. 　B．To see her friends.C．To a farm.D．To see some flowers.小题5:How does she ask the way to the flower show?A．She asks the way in Chinese.B．She asks the way with a sigh (标志).C．She draws a picture to ask the way.D．She doesn't ask any people.