【单选题】【消耗次数：1】
流行病学研究是从
①
个体水平研究疾病
②
群体水平研究疾病
③
分子水平研究疾病
④
细胞水平研究疾病
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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
随机题目
【单选题】
It was not until she had arrived home __________ remembered her appointment with the doctor.
①
when she
②
that she
③
and she
④
she
【单选题】
If only he __________ what I tell him, but he won’t.
①
had done
②
would do
③
would have done
④
has done
【单选题】
I am very grateful to you for what you’ve given me and __________ you have done for me.
①
which
②
that
③
all what
④
all that
【单选题】
Did Tom tell you to water the flowers?
①
No. And so did I
②
No. And neither did I
③
He did And so I did
④
He did And so do I
【单选题】
I __________ an interesting news item in yesterday’s Times.
①
came across
②
came up
③
came to
④
came over
【单选题】
Many Americans worry about leisure and hurry from one activity to the next, __________ little time to stop and think.
①
leave
②
leaving
③
left
④
to leave
【单选题】
Sorry to interrupt, but can you give me another copy of the handout?
①
No, of course not
②
Certainly
③
I’m sorry to hear that
④
By no means, but it’s impossible