GWD3-Q20:
Shipping Clerk: The five specially ordered shipments sent out last week were sent out on Thursday. Last week, all of the shipments that were sent out on Friday consisted entirely of building supplies, and the shipping department then closed for the weekend. Four shipments were sent to Truax Construction last week, only three of which consisted of building supplies.
If the shipping clerk’s statements are true, which of the following must also be true?
A. At least one of the shipments sent to Truax Construction last week was specially ordered.
B. At least one of last week’s specially ordered shipments did not consist of building supplies.
C. At least one of the shipments sent to Truax Construction was not sent out on Thursday of last week.
D. At least one of the shipments that were sent out on Friday of last week was sent to Truax Construction.
E. At least one of the shipments sent to Truax Construction last week was sent out before Friday.
希望能给解释作者: psychepsyche 时间: 2012-1-7 06:33
题目中有四个条件：
1、5艘OS礼拜四出发。（没有说只有这些是OS的）
2、星期五出发的船把全部有BS。（就是说，星期五出发的一定都有BS，但是有BS的不一定是星期五出发的。）
3、有四艘船到了TC，只有三艘是有BS的。
4、礼拜五之后就没有船出发了。（the shipping department then closed for the weekend）
（注意：上述条件的船是可以重合的，如：有一艘船是OS的，又是装了BS的，也到达了TC）
