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?
Here, I think A and B are to some extent equivalent hence E is right.
What do others think about this problem? Any comments?
Thx.
"only three of which consisted of building supplies"--->"At least one of the shipments sent to Truax Construction last week was not sent on Friday" ---> But is there any shipments sent out other than on Friday or Thurday?
For A and B, they automatically assume there are no other shipments we could resort to.
So, we could infer that A "At least one of the shipments sent to Truax Construction last week was specially ordered"
and since "only three of which consisted of building supplies" which means there is one not consisted of building supplies,
we could further get B "At least one of last week’s specially ordered shipments did not consist of building supplies".
I wonder whehter my analysis is correct. If so, we could claim that A and B are equivalent. So, the key should be E.
因为从原文只知周五SHIPMENT的都包括building supplies，不知其他时间SHIPMENT是否包括building supplies，所以去TC的四个SHIPMENT不知何时送出（除知一个不是周五，因为没有building supplies），也有可能除周五外的其他时间，因为也可能其它时间SHIPMENT的有building supplies。因为不知何时送出，所以也不知至少有一个周四送出，何况周四送出也不一定是specially ordered（specially ordered都周四送出，不等于周四送出的都是specially ordered）。所以A和原文信息还差远，不可能是MUST BE。又因为不知其他时间的SHIPMENT是否有building supplies，所以B也错。至于A，B是否相当，我认为两者差别太大了，谈不上相当。
谢谢 usdream解释和清楚~
因为从原文只知周五SHIPMENT的都包括building supplies，不知其他时间SHIPMENT是否包括building supplies，所以去TC的四个SHIPMENT不知何时送出（除知一个不是周五，因为没有building supplies），也有可能除周五外的其他时间，因为也可能其它时间SHIPMENT的有building supplies。因为不知何时送出，所以也不知至少有一个周四送出，何况周四送出也不一定是specially ordered（specially ordered都周四送出，不等于周四送出的都是specially ordered）。所以A和原文信息还差远，不可能是MUST BE。又因为不知其他时间的SHIPMENT是否有building supplies，所以B也错。至于A，B是否相当，我认为两者差别太大了，谈不上相当。
这是一道纯逻辑题，推理需十分严密，到更像lsat的题目
很像LSAT题!
大家一定要认真读题,我刚开始也做错了,是因为没看清题和选项,真到考试这样就太可惜咯
E 对, A、B不对的原因是文中没有提到星期四除了specially ordered shipments之外是否还有其他，也没说周一到周三的怎么样,所以不知道四个中剩下的那一个到底是周一到周四哪一天哪一个的。但是，确实可以知道这剩下的一个是周五以前的，因为周五的“all"全部都是含有building supplies的，这是ETS最喜欢的伎俩之一，范围词一定要注意！
我的想法如下
? 只有SUPPLY的船 周五
5只 周四
4只回来, 3只有SUPPLY, 1只肯定是周四出去的.
3-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?
文章中并没有说，shipping department的shipments除了specially ordered shipments就是building supplies shipments,也有可能有其他种类的shipments。所以没法判定TC收到的除了building supplies以外的另一个是SPECIALLY ORDERED了。
文中没有specially ordered shipments与building supplies shipments之间关系的描述，所以B错误
FLAW: 周四除了送出specially ordered shipments，还可能送出其他种类，其中包括building supplies shipments。所以也有可能送去TC的four shipments都是周四送出的。
同C，既然可以推得出送去TC的货可以全部在周四进行，同样文中没有提到的周一，周二，周三都符合。
周五的shipments只有building supplies，而送去TC的货只有三个是building supplies，说明一定有一个是在周五以外的时间送去
的。正确
这道题 是蒙德。 但看了 解释后还是超级晕
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.
Thursday: 5 specially order
Friday: all are building supplies
No shipment on Weekends
Truax: 4 ( 3 are building)
Since Friday is the last day and just has building supplies; Truax has no-building supply
We can conclude the no-building supply is sent before Friday
从上面分析来看A和B错，还是有道理的。
我的想法是这样的，
我开始也觉得ABE是一个意思，但现在看来只有E最严谨。
在送往TC的五个东西里面：
三个是building——〉来源：周一，二，三，四，五（周一到周三也可能送building；周四特别说明，文中说上周的special都是周四送的，只能表明其他四天没有special，不说明周四只有special，周四可能送了五个special，还送了一个building，也可能还有wood）
一个不是building——〉来源：周一，二，三，四（不一定是special，可能是wood，所以周一，二，三也有可能，又因为周四也不只是special，可能也有比如wood，所以周四仍然有可能）
由图可以看出，结论只能说明至少有一个不是周五的。
我的想法是这样的，
我开始也觉得ABE是一个意思，但现在看来只有E最严谨。
在送往TC的五个东西里面：
三个是building——〉来源：周一，二，三，四，五（周一到周三也可能送building；周四特别说明，文中说上周的special都是周四送的，只能表明其他四天没有special，不说明周四只有special，周四可能送了五个special，还送了一个building，也可能还有wood）
一个不是building——〉来源：周一，二，三，四（不一定是special，可能是wood，所以周一，二，三也有可能，又因为周四也不只是special，可能也有比如wood，所以周四仍然有可能）
由图可以看出，结论只能说明至少有一个不是周五的。
A：选A的人默认了那个不不是building的就是special，其实可以是更多其他的东西，比如wood，不妨假设那个不是building的不是special，也可以是wood；
B：选B的人默认了那个不是building的就是周四的，其实可以是其他时间，周一到周三，不妨假设周四的全是building，我们这个不是building的可以是周一二三运来的啊。
希望和大家共同讨论，共同进步！
E
其他选项都过于极端
因为从原文只知周五SHIPMENT的都包括building supplies，不知其他时间SHIPMENT是否包括building supplies，所以去TC的四个SHIPMENT不知何时送出（除知一个不是周五，因为没有building supplies），也有可能除周五外的其他时间，因为也可能其它时间SHIPMENT的有building supplies。因为不知何时送出，所以也不知至少有一个周四送出，何况周四送出也不一定是specially ordered（specially ordered都周四送出，不等于周四送出的都是specially ordered）。所以A和原文信息还差远，不可能是MUST BE。又因为不知其他时间的SHIPMENT是否有building supplies，所以B也错。至于A，B是否相当，我认为两者差别太大了，谈不上相当。
真他妈牛……
为社么我会局限在只有周四和周五？！！！
一开始看到题目完全看不懂, 也不知道怎选
看到答案才了解, 这有点像"魔术"的手法
原题没有给予任何情况的交集, 因此没有办法推断出哪天派出什么船
但答案E的作用是, 不管前面是什么情况, 在"friday之前"派出的船一定会有一条是到Truax Construction的, 意思是100%命中, 保证正确.
答案D则是特指Friday这天的情况, 因为原题没有给予条件, 因此无法推断
其他答案也都是一样
这题我到觉得是考抗干扰的能力
被题目吓到就乱了
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