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hi,
大家发言很热烈啊，很抱歉我来晚了，让大家很着急
我来说一下8的看法。
8.Blood banks will shortly start to screen all donors for NANB hepatitis.Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.The argument above depends on which of the following assumptions?
(A)Donors carrying NANB hepatitis do not,in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
(B) Donors carrying NANB hepatitis do not,in a large percentage of cases, develop the disease themselves at any point.
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors.
判断是不是ASSUMPTION的好办法是把选择否定，
然后放进原文，看是不是
1）阻碍了结论的道出
2）而且和原文中的条件一致，搭配紧密
先看E，否定了以后变成：
The donors who will still supply NANB-contaminated blood will NOT donate blood at the average frequency for all donors.
符合了1），
但是好象2）中的“和原文条件搭配紧密”没有做到。
先放一放
再看A）
否定以后成为：
A)Donors carrying NANB hepatitis DO,in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed。
显然1）是可以的，这个理由很明显啊，如果一个人有很多病。。。那么一开始就被拒绝献血了。
再看2）显然比E）要来的强，因为这里都是在说TESTS，什么病。。。
我一开始也选了E，但是看了一下A觉得A比E好，
另外在其他地方我也遇到相似题目：
某学校研究生招生，决定对每个申请人的还贷款进行检查，发现有人不还钱的，就不收，但是这样还是有漏网只鱼。问ASSUMPTION，
就有一个选象是：
这些申请人没有其他会被距收的理由。
该题目来自PR
谢谢大家 |
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