Kaplan模考的错题...

twinhead

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.

maryland

1.D
（1） 平均速度=路程/时间=120/3=40
（2）设总路程为a。
(a/2)/30+(a/2)/60=3
a=120
同上可得：120/3=40

2.当时也花了好几分钟做这题，确实要小心的说。[em23]

cook

We should be very , very careful!!! [em18][em18][em18]

sandwolf

第一题是B吗？

还有，
那题有图的，我认为是2M的标记容易让人误解，2M其实是指重叠部分的长度。
54-（54+2）/2＝26才是正选吧。

[此贴子已经被作者于2002-10-9 11:15:03编辑过]