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【判断题】
重复抽样误差大于不重复抽样误差。 ( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】根据句意、汉语或首字母提示以适当形式填写正确的单词。 fly teacher miss heavy he 1. In China, September 10th is _____ Day. 2. When Jack came to himself, he was lying in a street and his purse was _____. 3. Because it...
【单选题】关于核酸分子组成的叙述，正确的是
A.
核苷是核酸的基本单位
B.
核酸的基本单位是核苷酸
C.
DNA和RNA中都有稀有碱基
D.
DNA与RNA的区别只是碱基不同
E.
DNA与RNA的区别只是戊糖不同
【单选题】What kind of help will the conselors offer to those students?
A.
Refine their interviewing techniques.
B.
Arrange their work schedules.
C.
Select appropriate courses.
D.
Write cover letters.
【单选题】Mr. Black was late because he _______ his way. A. losted B. lose C. loses D. lost
A.
1
B.
2
C.
3
D.
4
【简答题】根据所给要求，改写下列句子。每空格限填一词。 1. The new flat cost Mr. Black a lot of money. (改为否定句) The new flat ______ cost Mr. Black ______ money. 2. The red bike belongs to my mother. (对划线部分提问) ______ ______ belongs to ...
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