新东方蓝皮书XDF-DS-15 题 疑惑！~

hilasa

XDF-DS-15

On a certain day it took Bill three times as long to drive from home to work as it took Sue to drive from home to work. How many kilometers did Bill drive from home to work?
(1) Sue drove 10 kilometers from home to work, and the ratio of distance driven from home to work time to drive from home to work was the same for Bill and Sue that day.
(2) The ratio of distance driven from home to work time to drive from home to work for Sue that day was 64 kilometers per hour

答案是A

1：题目是什么意思？是Bill’s distance=3*Sue's distance 还是 Bill's time =3*Sue's time呢？怎么都读不清楚
2：The ratio of distance driven from home to work time to drive from home to work for Sue 是Sue's speed的意思么？怎么感觉语法不通顺，读不明白呀

希望nn指教！！

张大猴

The ratio of distance driven from home to work time to drive from home to work for Sue 就是sue的速度，虽然这个句子我也没读明白，大致意思就是从家到工作地点距离和时间的比率，但是（2）说...was 64 kilometers per hour,那么就是速度了

题目说bill花了sue三倍的时间 took times就是花费时间的意思，bill从家到工作地点走了多少km
（1）sue从家到工作地点开了10km，她和bill速度相等
10/t=bill的路程/3t    就能求出bill走了多少km了
（2）sue的速度是64km/h,无法求解

hilasa

哦 这个意思~
但是一般说比率不是会说the ratio of x to y 吗？
它这个句子怎么没有to呢 the ratio of (distance driven from home to work)(time to drive from home to work)？

张大猴

我不知道了哈 要是 the ratio of (distance driven from home to work)to（time drive from home to work)就好了哈 完全对称

hilasa

是啊 这题是不是印错了？。。。