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Which of the following most logically completes the passage?

Appendicitis (inflammation of the appendix) is potentially fatal; consequently, patients with symptoms strongly suggesting appendicitis almost always have their appendix removed. The appropriate surgery is low-risk but performed unnecessarily in about 20 percent of all cases. A newly developed internal scan for appendicitis is highly accurate, producing two misdiagnoses for every 98 correct diagnoses. Clearly, using this test, doctors can largely avoid unnecessary removals of the appendix without, however, performing any fewer necessary ones than before, since ______.

正确答案: B

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求指点:本月逻辑JJ15题

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发表于 2012-2-7 12:18:14 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Appendicitis (inflammation of the appendix) is potentially fatal;consequently, patients with symptoms strongly suggesting appendicitis almostalways have their appendix removed. The appropriate surgery is low-risk butperformed unnecessarily in about 20 percent of all cases. A newly developedinternal scan for appendicitis is highly accurate, producing two misdiagnosesfor every 98 correct diagnoses. Clearly, using this test, doctors can largelyavoid unnecessary removals of the appendix without, however, performing anyfewer necessary ones than before, since _____.

A. the patients who are correctly diagnosed with this test as not havingappendicitis invariably have medical conditions that are much less serious thanappendicitis

B. the misdiagnoses produced by this test are always instances of attributingappendicitis to someone who does not, in fact, have it
(这个测试的误诊常常源于把原来没有阑尾的测试成有)

C. all of the patients who are diagnosed with this test as having appendicitisdo, in fact, have appendicitis

D. every patient who is diagnosed with this test as having appendicitis hasmore than one of the symptoms generally associated with appendicitis

E. the only patients who are misdiagnosed using this test are patients who lackone or more of the symptoms that are generally associated with appendicitis
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沙发
发表于 2012-2-7 12:27:50 | 只看该作者
B?
板凳
发表于 2012-2-7 12:37:05 | 只看该作者
b????
地板
 楼主| 发表于 2012-2-7 12:38:13 | 只看该作者
对,就是B,可否请两位分析一下逻辑链呢
5#
发表于 2012-2-7 12:47:45 | 只看该作者
我觉得B选项的翻译有问题
我理解的应该是 这个测试的误诊常常是于把原来有的阑尾的测试成没有
6#
 楼主| 发表于 2012-2-7 12:56:36 | 只看该作者
哦~了解了~谢谢~
7#
发表于 2012-2-7 13:03:06 | 只看该作者
我理解B的翻译是 这些误诊经常是发生在那些并没有得阑尾炎的人身上
8#
发表于 2012-3-2 22:34:23 | 只看该作者
http://forum.chasedream.com/GMAT_Math/thread-655511-1-1.html?postid=15886993&searchmode=TopicContent&searchtext=appendicitis#last这里有详细解释
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