两样本均数的比较可采用（） A.t检验 B.方差齐性检验 C.方差_爱下问搜题

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问题单项选择题 A1型题

两样本均数的比较可采用（）

A.t检验

B.方差齐性检验

C.方差齐性检验与t检验均可

D.方差分析

E.方差分析与t检验均可

答案

参考答案：E

单项选择题

()的工频电流即可使人遭到致命的电击。

A．数安

B．数毫安

C．数百毫安

D．数十毫安

完形填空

A wise man was visiting the Ganges, a river which flows through northern India, to take a bath. He found a group of family members on the 16 ， shouting angrily at each other.He 17 his disciples (弟子), smiled and asked, “Why do people shout in 18 at each other？”The disciples 19 for a while and one of them said, “Because we 20 our calm, we shout.”“But, why should you shout 21 the other person is just next to you? You can as well tell him what you have to say in a(n) 22 manner，” asked the wise man. Some disciples gave some other answers, but none 23 the other disciples. Finally the wise man explained, “When two people are angry at each other, there is a distance between their 24 . To cover that distance they must shout to be able to 25 each other. The angrier they are, the louder they will have to shout to 26 that great distance. What 27 when two people fall in love? They don't shout at each other but talk softly, because their hearts are very 28 . The distance between them is either nonexistent (不存在的) or very small.”
The wise man 29 ，“When they love each other even more, they do not 30 ， but only whisper and they get even closer to each other. Finally they 31 need not whisper. They only look at each other and that's 32 . That is how close two people are when they love each other.”
He looked at his disciples and said, “So when you 33 ， do not let your hearts get distant. Do not say words that distance each other more. 34 there will come a day when the distance is so great that you'll not find the path to 35 . You may end up becoming enemies, for instance.”

A．referred to

B．attended to

C．disappointment

D．responsible

C．entertained

A．Worse still