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我来贴吧，22我也错了
24-22 Often patients with ankle fractures that are stable, and thus do not require surgery, are given follow-up x-ray because their orthopedists are concerned about possibly having misjudged the stability of the fracture. When number of follow-up x-rays were reviewed, however, all the fractures that had initially been judged stable were found to have healed correctly. Therefore, it is a waste of money to order follow-up x-rays of ankle fracture initially judged stable.
Which of the following, if true, most strengthens the argument?
A) Doctors who are general practitioners rather than orthopedists are less likely than orthopedists to judge the stability of an ankle fracture correctly.
B) Many ankle injuries for which an initial x-ray is ordered are revealed by the x-ray not to involve any fracture of the ankle.
C) X-rays of patients of many different orthopedists working in several hospitals were reviewed.
D) The healing of ankle fractures that have been surgically repaired is always checked by means of a follow-up x-ray.
E) Orthopedists routinely order follow-up x-rays for fractures of bone other than ankle bones.
答案选Ｂ，为什么？？没明白，我瞎选了Ｅ
24-35: The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain. To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain. The injected mice showed far less interest in feeding than normal newborn mice do. Therefore, cannabinoids probably function to stimulate the appetite.
Which of the following is an assumption ok which the argument depends?
A) Newborn mice do not normally ingest any substance other than their mothers’ milk.
B) Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
C) The mothers of newborn mice do not normally make any effort to encourage their babies to feed.
D) The mild of mammals would be less nutritious if it did not contain cannabinoids.
E) The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.
答案事Ｅ，这个chemical发挥作用有两个途径：１block cannabinoids;2 独立发挥作用，使得小白鼠没了胃口。因此要确认试验结果是由原因１造成的，就必须确认２不可能，因此答案是Ｅ
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发表于 2005-7-17 16:03:00
