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【单选题】
在病例对照研究中，控制混杂偏倚的措施不包括A.
制定明确的排除混杂因素标准
B.
尽可能采用随机抽样
C.
选择尽可能多的条件加以匹配
D.
采用分层分析方法
E.
采用多因素分析方法
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【简答题】Our grand China tour will show you a different China! But you are required to present a US passport when entering China. For some important information on how to apply for a passport, see the followin...
【简答题】啤酒的最佳饮用温度是?
【简答题】针对当前我国化学药品生产所面临的问题,如何提高我国医药企业的研发能力?
【单选题】The main participants of the Grand Tour were mostly people of _____.
A.
upper class
B.
lower class
【单选题】51 What is said about the Grand Tour?
A.
It was fashionable among young people of the time
B.
It was unaffordable for ordinary people
C.
It produced some famous European artists
D.
It made a compulsory part of college education
【多选题】The main destinations of the Grand Tour were_____.
A.
France
B.
Italy
C.
Switzerland
D.
Germany
【简答题】根据中文意思写单词 目击,见证
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