一道GWD-TN-2中的题 大家帮忙看一下！谢谢大家！^^

joyous314

GWD3-Q20:
Shipping Clerk: The five specially ordered shipments sent out last week were sent out onThursday.  Last week, all of theshipments 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 TruaxConstruction last week, only three of which consisted of building supplies.
If the shipping clerk’s statements are true, whichof 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.
答案是E
大家帮忙看看吧，这道题看的我晕晕的，一套做完后回来再看还是想不明白==....
谢谢大家了！

irisjiaolee

Shipping Clerk:上个星期有五个特别的shipments在星期四出发。上星期，全部在周五出发的shipments都是building supplies，shipping department在周末关闭。上个星期有四个shipments被送到Truax Construction，其中有三个是building supplies.
问：如果shipping clerk说的是真的，以下哪个是正确的？

分析：如果信息为真，那么说明被送到Truax Construction的shipments中有一个不是building supplies，说明这个shipment不可能是星期五或者周末发的，肯定是周五之前发的。所以E正确。

sdcar2010

E  

周五的shipments全部是building supplies ;  Truax 共有四个shipments, 其中三个是building supplies, 一个是非builiding supplies.   极端情况，假设三个building supplies shipments 都在周五发出，那也至少有一个是在周五以前发出。

(A) could be wrong because we do not know what was shipped out on Monday, Tuesday, and Wednesday.  Maybe a non-special ordered, no-building material reached the T-company.

joyous314

Shipping Clerk:上个星期有五个特别的shipments在星期四出发。上星期，全部在周五出发的shipments都是building supplies，shipping department在周末关闭。上个星期有四个shipments被送到Truax Construction，其中有三个是building supplies.
问：如果shipping clerk说的是真的，以下哪个是正确的？

分析：如果信息为真，那么说明被送到Truax Construction的shipments中有一个不是building supplies，说明这个shipment不可能是星期五或者周末发的，肯定是周五之前发的。所以E正确。

-- by 会员 irisjiaolee (2011/5/1 22:23:22)

恩，已经明白了，谢谢你，愿你考个好成绩！^^

joyous314

E  

周五的shipments全部是building supplies ;  Truax 共有四个shipments, 其中三个是building supplies, 一个是非builiding supplies.   极端情况，假设三个building supplies shipments 都在周五发出，那也至少有一个是在周五以前发出。

(A) could be wrong because we do not know what was shipped out on Monday, Tuesday, and Wednesday.  Maybe a non-special ordered, no-building material reached the T-company.

-- by 会员 sdcar2010 (2011/5/2 0:54:33)

恩，已经明白了，谢谢你，愿你拿个好成绩^^