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【单选题】
( )是把总体按照某一属性可特征分成若干层次或类别,然后以各层或各类在总体中所占比重,按照比例随机抽取样本。A.
简单随机抽样
B.
系统随机抽样
C.
分层抽样
D.
整群抽样
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反馈参考答案：
举一反三
【判断题】Decide whether the following statements are true or false according to Text A . According to Ferris Greenslet, mistakes can grow to be truths.
A.
正确
B.
错误
【单选题】Monica smiled and said, “That was just what the doctor ordered,” after I had ___________.
A.
given her some medicine.
B.
massaged her shoulders.
C.
made an appointment with the doctor
D.
given her an order
【判断题】Decide whether the following statements are true or false according to Text A. According to the author, the word poet stands for a human spirit.
A.
正确
B.
错误
【判断题】Activity 1 Reading comprehension Decide whether the following statements are True (T) or False (F) according to Text A. ( ) 1. According to the author, it is helpful for children to improve the pr...
A.
正确
B.
错误
【单选题】The doctor ordered some ____ for Sue.
A.
hurt
B.
medicine
C.
temperature
D.
get rid of
E.
infection
【判断题】Decide whether the following statements are true or false according to Text A. According to the text, the primary reason for the existence of universities is to be found neither in the mere knowledge ...
A.
正确
B.
错误
【简答题】他们给儿子取名为亨利。 they, their, son, Henry, named
【判断题】Decide whether the following statements are true or false according to Text A . Numbers provided by the computer are only raw materials, according to the author.
A.
正确
B.
错误
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