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【单选题】
关于两独立样本均数比较的t检验,下面说法错误的是A.
适用于正态分布的计量资料
B.
要求资料总体方差相等
C.
自由度为n1+n2-2
D.
可以用于比较3个总体均数有无差异
E.
适用于小样本资料
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举一反三
【单选题】If his father could not keep up the payments on the mortgage, his uncle might ______ it for him.
A.
redeem
B.
amend
C.
resemble
D.
appeal
【单选题】The manager spoke highly fo such ____ as loyalty,courage and truthfulness shown by his employees.
A.
virtues
B.
features
C.
properties
D.
characteristics
【判断题】When skimming, we watch for signal words or phrases to follow the author’s direction.
A.
正确
B.
错误
【单选题】At the dinner held in his honor, Miller ______ a toast to the lasting friendship of his former classmates.
A.
proposed
B.
suggested
C.
raised
D.
forwarded
【简答题】预备党员的预备期为( )年。(大写)
【判断题】When skimming, we watch for signal words or phrases to follow the author’s direction.
A.
正确
B.
错误
【简答题】影响钙吸收利用的因素有哪些?
【简答题】2019的卧室门从()变为() 。
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