1)
If he did not stop alone the way, what speed did Bill average on his 3-hour trip?
1 He traveled a total of 120 miles
2 He traveled half the distance at 30 miles per hour, and half the distance at 60 miles per hour.
2)还有一题觉得很easy却和答案不同,百思不得其解准备发帖讨教时突然明白了问题所在.
[upload=jpg]uploadImages/20021091114944076.jpg[/upload]
'Overlap' means "交叠"
mistake for the word 'gap' which means "缺口"
一个词都马虎不得,前车之鉴引以为戒.作者: sandwolf 时间: 2002-10-9 11:15