[原创]北美，１０月２8，ＪＪ

CR:

1.GWD 21-4

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 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     .

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

B.     the misdiagnoses produced by this test are always instances of attributing appendicitis to someone who does not, in fact, have it

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

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

E.      the only patients who are misdiagnosed using this test are patients who lack one or more of the symptoms that are generally associated with appendicitis

(B)

2.[引用前JJ]一个城市两座桥，相距很远。东桥要修，所以不征税，西桥照样走，但是税收加倍（因为弥补东桥不征税带来的损失）。结论是政府税收不会收到影响。问assumption.
3..[引用前JJ]小綿羊常因冬天過冷而凍死，有個新發明發明了M的一種設備，可以讓小羊待過寒冷的冬天，設備費用小於一隻成羊死亡的錢，但對農場的人來說來是太貴了，但其實只要裝一部份M就可以了,since________
   我選會凍死的小羊通常都體重過輕

RC: