标题: [求助]请教LSAT-1-1-14 [打印本页] 作者: dreadpower 时间: 2004-1-6 16:30 标题: [求助]请教LSAT-1-1-14 Either Perry’s faction or Tucker’s faction, but not both, will win control of the government. If Perry’s faction wins, the nation will suffer economically. If Tucker’s faction wins, the nation will suffer militarily. Given the statements in the passage, which one of the following statements must be true? (A) It is possible, but not certain, that the nation will neither suffer economically nor suffer militarily. (B) If the nation suffers economically, it is certain that Perry’s faction has won control of the government. (C) It is certain that the nation will suffer either economically or militarily, and also certain that it will not suffer both. (D) If the nation suffers militarily, it is possible, but not certain, that Tucker’s faction has won control of the government. (E) If the nation suffers both economically and militarily, it is certain that neither Perry’s faction nor Tucker’s has won control of the government. 答案是D,我选的是C,请教NN,为什么C错D对呢??
作者: qww 时间: 2004-1-6 16:57
If Perry’s faction wins(必要条件A1) ,the nation will suffer economically.(结论B1) If Tucker’s faction wins(必要条件A2), the nation will suffer militarily(结论B2) A1--->B1,A2--->B2. A1成立则B1一定成立。也就是说Perry's faction wins,国家将遭受经济困难,但国家遭受经济困难不一定一定是P 执政。同理A2成立则B2一定成立。 B2发生不一定A2一定发生。 所以D。这种题多做几道,很快就能判断了。作者: dansy 时间: 2004-1-6 16:58
我的理解是第一句话是说P和T中只能有一个当选,但是并没有表明除了他俩的党派之外就没有其他党派了。作者: qww 时间: 2004-1-6 17:06
dansy mm 我认为对第一句话的理解有偏差,应该就是P or T 当选。没有其它党的可能。 关键是P当选不一定就没有军事问题了,只能肯定有经济问题。 你在看一下。作者: dreadpower 时间: 2004-1-6 17:53
基本理解了,谢谢答复。还有一点:
”If Perry’s faction wins(必要条件A1) ,the nation will suffer economically.(结论B1)“
我觉得If Perry’s faction wins是the nation will suffer economically的充分条件,因为Perry’s faction wins推出the nation will suffer economically。 作者: dansy 时间: 2004-1-6 19:15
if A, then B==== A---->B, 即A是B的充分条件。 qww GG, 我能理解答案D中的关系。对於第一句的理解,如果是你所说的意思的话,那就是C的前半句是对的,后半句不对,也就是it is possible that it will not suffer both. 是这个意思吗?作者: flora_wang 时间: 2004-1-9 03:31
偶觉得c的后半句是不对, 应该是 it is possible that it will suffer both. 偶同意dreadpower,
If Perry’s faction wins(充分条件A1) ,the nation will suffer economically.(结论B1) If Tucker’s faction wins(充分条件A2), the nation will suffer militarily(结论B2) A1--->B1,A2--->B2. A1成立则B1一定成立。也就是说Perry's faction wins,国家将遭受经济困难,但国家遭受经济困难不一定一定是P 执政。同理A2成立则B2一定成立。 B2发生不一定A2一定发生。作者: madtears 时间: 2004-3-9 23:24
简化条件