牛牛帮我解答下这道题吧~~我完全迷惑了，谢谢啦gwd2 ——20

南天天

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.

HarrisZheng

条件
1 周二发的五船都是SO
2 在周五发出的所有船都是BS
3 周五以后就不发货了
4 TC收到四船货，其中三船是BS

Specially ordered不确定是什么东西

E 条件2+条件4可以得出 TC至少有一船货不是周五收到的， 不然就全是BS了 再由条件3得出 至少有一船是周五之前的

南天天

谢谢谢谢啦~~我昨天还想了一下午~~