喜多郎 发表于 2010-1-10 08:27:58

这题咋做？

Questions 13–17
In a repair facility there are exactly six technicians: Stacy,Urma,Wim, Xena, Yolanda, and Zane. Each technician repairs machines ofat least one of the following three types—
radios, televisions, and VCRs—and no other types. The following conditions apply:
Xena and exactly three other technicians repair radios.
Yolanda repairs both televisions and VCRs.
Stacy does not repair any type of machine that Yolanda repairs.
Zane repairs more types of machines than Yolanda repairs.
Wim does not repair any type of machine that Stacy repairs.
Urma repairs exactly two types of machines.

13. For exactly how many of the six technicians is it possible
to determine exactly which of the three types of machines each repairs?
(A) one
(B) two
(C) three
(D) four
(E) five

14. Which one of the following must be true?
(A) Of the types of machines repaired by Stacy there is exactly one type that Urma also repairs.
(B) Of the types of machines repaired by Yolanda there is exactly one type that Xena also repairs.
(C) Of the types of machines repaired by Wim there
is exactly one type that Xena also repairs.
(D) There is more than one type of machine that both
Wim and Yolanda repair.
(E) There is more than one type of machine that both
Urma and Wim repair.

15. Which one of the following must be false?
(A) Exactly one of the six technicians repairs exactly one type of machine.
(B) Exactly two of the six technicians repair exactly one type of machine each.
(C) Exactly three of the six technicians repair exactly one type of machine each.
(D) Exactly one of the six technicians repairs exactly two types of machines.
(E) Exactly three of the six technicians repair exactly two types of machines each.

16. Which one of the following pairs of technicians could
repair all and only the same types of machines as each other?
(A) Stacy and Urma
(B) Urma and Yolanda
(C) Urma and Xena
(D) Wim and Xena
(E) Xena and Yolanda

17. Which one of the following must be true?
(A) There is exactly one type of machine that bothUrma and Wim repair.
(B) There is exactly one type of machine that both Urma and Xena repair.
(C) There is exactly one type of machine that both Urma and Yolanda repair.
(D) There is exactly one type of machine that both Wim and Yolanda repair.
(E) There is exactly one type of machine that both Xena and Yolanda repair.

霹雳油侠 发表于 2010-1-10 10:00:40

顶。

祝子 发表于 2010-1-10 10:05:59

翻译成为汉语，然后再纸上排排列、组组合什么的，来点逻辑调料的肯定就出来了

老熊更笨 发表于 2010-1-10 15:37:50

都怪我的拼音没学好『大汗』
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