题目

What did the woman want the man to do?A.To go along to meet her friend with her.B.To do the woman’ s work.C.To meet Tony for her. 答案：【答案】C【解析】【原文】W: Could you do me a real favor, please?M: Yes, of course.W: I’ve arranged to meet my friend Tony, but I’m really engaged now. I was wondering if you could go along and meet him for me.M: Oh, yes, certainly!几个水球可以挡住子弹?《国家地理频道》实验证实:四个水球就足够!四个完全相同的水球紧挨在一起水平排列，子弹在水球中沿水平方向做匀变速直线运动。恰好能穿出第四个水球，则可以判定( )A.由题干信息可以确定子弹在毎个水球中运动的时间相同B.由题干信息可以确定子弹穿过每个水球的时间C.子弹在每个水球中速度变化相同D.子弹穿出第三个水球的瞬时速度与全程的平均速度相等