问一道逻辑题！

timohuuUID: 3213764

5. When a driver is suspected of having had too much to drink, testing the driver's ability to walk a straight line gives a more reliable indication of fitness to drive than does testing the driver's blood-alcohol level.



Which of the following, if true, best supports the claim made in the statement above?
(A) Not all observers will agree whether or not an individual has succeeded in walking a straight line.
(B) Because of genetic differences and variations in acquired tolerance to alcohol, some individuals suffer more serious motor impairment from a given high blood-alcohol level than do others.
(C) Tests designed to measure blood-alcohol levels are accurate, inexpensive, and easy to administer.
(D) More than half the drivers involved in fatal accidents have blood-alcohol levels that exceed the legal limit, whereas in less-serious accidents the proportion of legally intoxicated drivers is lower.
(E) Some individuals with high blood-alcohol levels are capable of walking a straight line but are not capable of driving safely.
答案是B，虽然我是选择对了，其他几个选项也是明显错的，但是这个B答案我却解释不通，求教帮忙解释一下，三克油。。。

sorcer13339UID: 3412779

(B) Because of genetic differences and variations in acquired tolerance to alcohol, some individuals suffer more serious motor impairment from a given high blood-alcohol level than do others.
这个很简单，因为对司机进行测试的唯一目的是验证他是否有安全驾驶的能力
检验血中酒精是基于“血液中酒精过多既饮酒会让人失去安全驾驶能力”这个被普遍认同的结论
但是这种概率性结论都是有一定程度的例外的
有人可能喝了不少酒但是P事没有，也有人可能闻了一下就醉了，这个选项说的就是这两种情况

crazyrobinUID: 2368627

沙发正解。
我来说下解题流程
这题问的是best supports其实就是strengthen
prompt直接是conclusion,没有推理，testing the driver's ability to walk a straight line gives a more reliable indication of fitness to drive than does testing the driver's blood-alcohol level.
这题问的是 testing fitness to drive.
你直接strengthen结论就可以。 B是其中之一，也就是有人酒精容量大，喝了酒没事，还能drive.这其实在说test会不准确。

ecustdreamerUID: 3396543

这里面有logical gap 是：1、喝酒了的人比不喝酒的人走不正  2、走不正比alcohol浓度更明显
B就是填补了前一个gap

crazyrobinUID: 2368627

ecustdreamer 发表于 2013-3-5 21:49
这里面有logical gap 是：1、喝酒了的人比不喝酒的人走不正  2、走不正比alcohol浓度更明显
B就是填补了前 ...

:lol
跟我学的开始用gap了
good work!!!

ecustdreamerUID: 3396543

crazyrobin 发表于 2013-3-5 21:52
跟我学的开始用gap了
good work!!!

嘿嘿，刚刚就想截图给你看看对不对来着

timohuuUID: 3213764

ecustdreamer 发表于 2013-3-5 21:54
嘿嘿，刚刚就想截图给你看看对不对来着

阅读狂错，错的我好伤心:mad

ecustdreamerUID: 3396543

timohuu 发表于 2013-3-5 22:05
阅读狂错，错的我好伤心

先练读文章吧，用robin的方法去练，我练了2周感觉overall的把握好了很多。
详见5楼的备考日志

timohuuUID: 3213764

ecustdreamer 发表于 2013-3-5 22:20
先练读文章吧，用robin的方法去练，我练了2周感觉overall的把握好了很多。
详见5楼的备考日志

目前还有个毛病就是有些题，文章读懂了，还是错了，还有就是我看了答案后还是不很理解为什么要选择这个答案，怎么办？

ecustdreamerUID: 3396543

timohuu 发表于 2013-3-5 23:26
目前还有个毛病就是有些题，文章读懂了，还是错了，还有就是我看了答案后还是不很理解为什么要选择这个答 ...

。。。。我要知道的话就不二战了，多做多总结呗