[求助]新PREP2-74

painsper

74.

 

Comcorp Shipping Clerk:  Last week, no shipments of building supplies were sent out on Friday.  The five specially ordered shipments sent out last week were sent out on Thursday, and each of those specially ordered shipments consisted entirely of building supplies.  Four shipments were sent to Truax Construction last week, none of which consisted of building supplies.

If the shipping clerk’s statements are true, which of the following must also be true?

A. All of Comcorp’s shipments of building supplies last week were specially ordered.

B. None of Comcorp’s shipments sent on Friday of last week was sent to Truax Construction.

C. None of the shipments sent by Comcorp to Truax Construction last week was specially ordered.

D. None of Comcorp’s shipments sent on Thursday of last week was sent to Truax Construction.

E. All of Comcorp’s shipments of building supplies last week were sent out on Thursday.

我选的D，答案是C

pyrbbb

The
five specially ordered shipments sent out last week were sent out on
Thursday, and each of those specially ordered shipments consisted
entirely of building supplies.
关键是对这句话的理解：注意特指，那5个特殊箱子是在周四送出的。

并没有说周四只送了 5个 special order，如果周四 还送了 普通的 order，那么 有可能还是有送去comcorp的order。

painsper

谢谢，那就是上周 只有5个SPECIAL ORDER.

而且都在周四。得这么理解了

pianer

這題的關鍵在於是問must also be true
所以題目說
The five specially ordered shipments sent out last week were sent out on Thursday, and each of those specially ordered shipments consisted entirely of building supplies.
Four shipments were sent to Truax Construction last week, none of which consisted of building supplies.
可以確定的是 4 shipments were sent to TC last week≠5 specially ordered shipments =>(C)
但是(D)C上星期二送出去的貨物沒有一個是送到TC的-->則無法明確推知

hellower

The five specially ordered shipments sent out last week were sent out on Thursday,
主要是这句话的理解。这句话只是说五个特别预定含有BS的实在周四发出。并没有说周四发出的只有五个含有BS特别预定的货物。所以D那个选项无从推断