单选题：第4题_________

题目分类：卫生类
题目类型：单选题
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题目内容：

第4题_________ A．Such persons have a weak or damaged heart, high blood pressure, or other problems of the blood system.
B．Several of these conditions are present at the same time.
C．Most people suffer only muscle pain as a result of heat stress.
D．Several hot days are considered a heat wave.
E．So does extreme heat.
F．Doctors say people can do many things to protect themselves from the dangers of extreme heat.

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答案解析：

第2题_________

第2题_________A．Some believe the explosions were the work of Muslim separatists.

分类：卫生类题型：单选题

Initially most proprietary schools of medicine in America _

Initially most proprietary schools of medicine in America __________.A．had esta

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根据下面材料，回答题。 U.S. to Start $3.2 Billion Chiltd Health Study i

根据下面材料，回答题。 U.S. to Start $3.2 Billion Chiltd Health Study in JanuaryA study tha

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When the writer says "critical period", he means a period w

When the writer says "critical period", he means a period when__________.A．stud

分类：卫生类题型：单选题

Those who always look on the bright side of life are more l

Those who always look on the bright side of life are more likely to __________.

分类：卫生类题型：单选题