题目

一只小船在静水中的速度大小始终为8m/s,在流速为4m/s的河中航行,则河岸上的人能看到船的实际航速大小可能是                                                  (    )     A.1m/s                  B.4m/s                 C.8m/s               D.14m/s 答案:B C 解析:河岸上的人能看到船的实际航速大小范围是,所以只有BC符合。—Do you like playing football?—Yes. And               young people are good at playing football. [     ]A. many and many             B. much and much  C. little and little               D. more and more
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