【单选题】【消耗次数：1】
证明假设最可靠的方法是
①
回顾性调查
②
现况研究
③
动物实验
④
实验流行病学
⑤
队列研究
参考答案：
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相关题目
【简答题】
试述流行病学实验研究与队列研究的异同。
【单选题】
下列哪项是流行病学实验研究的优点
①
可计算相对危险度和归因危险度
②
能够及早治疗病人或预防和控制疾病
③
可平衡和控制两组的混杂因素提高两组可比性
④
省时、省钱、省力，可进行罕见病的研究
【简答题】
3、流行病学的研究方法有哪些？
随机题目
【单选题】
6.The university has introduced a new _______ of conduct on university life.
①
discipline
②
. code
③
key
④
. principle
【单选题】
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①
inferior
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③
superior
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27. I know the meeting will be on ______ Sunday in June, but I don’t know the exact date yet.
①
the
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a
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/
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each
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22. ______ Renaissance was the period of the revival of classical art and literature in the 14th to 16th centuries.
①
The
②
a
③
/
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. one
【单选题】
10.A discount will be offered to _____ customers to the store.
①
usual
②
ordinary
③
regular
④
old
【单选题】
17. Realizing the immense international pressure, the President_____ stepped down.
①
conspicuously
②
gracefully
③
lonely
④
. truly
【单选题】
2. Whenever I called in on Paul, he _______ on the phone.
①
talked
②
is talking
③
was talking
④
will talk
【单选题】
3. He ______ hard until I told him to sit down and have a break.
①
was working
②
had been working
③
worked
④
has worked
【单选题】
19. He tried to _____ from his memory what he knew of his former neighbor..
①
think of
②
remember
③
summon
④
gave way