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【判断题】
大肠仅包括盲肠、结肠、直肠和肛管。A.
正确
B.
错误
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【单选题】When we categorize fruits into spring fruits, summar fruits, fall fruits and winter fruits, we're dividing them based on ( ).
A.
Season
B.
Alphabet
C.
Location
D.
Meaning
【单选题】Lady Wang _____as a secretary for five years in the company, and now she is a general manager of it.
A.
has served
B.
serves
C.
had been serving
D.
served
【简答题】Directions:Read the text below. Write an essay about 120 words, in which you should summarize the key points of the text and make comments on them. Try to use your own words. It seems the nation’s you...
【单选题】对于抽样误差,下面正确的说法是( )。 A 抽样误差是随机变量; B 抽样平均误差是一系列抽样指标的标准差; C 抽样误差是估计值与总体参数之间的最大绝对误差; D 抽样误差是违反随机原则而产生的偏差; E 抽样平均误差其值越小,表明估计的精度越高。
A.
ABD
B.
DE
C.
ABC
D.
ABE
【简答题】阅读短文，判断正(T)误(F)。 I have been a news reporter for the past fif years. The job has taught me many unforgettable lessons. I have seen wars, poverty and death, but I have also seen courage (勇气), hope ...
【简答题】抽样误差是指随机抽样调查中()与()之间的差异。
【单选题】The author's attitude towards the North American Free Trade Agreement might be best summarize as one of______.
A.
pessimistic.
B.
indiffrret.
C.
disappointed but expecting.
D.
critical.
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