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第1题

设X,x2,,n是来自正态总体N(u,2)的简单随机样本,和2均未知,记x=x2=(x-2 则假设Ho:=0的t检验使用统计量 A T = XN-1/Q BT = X/Q
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第2题

When do you wish to visit Canada? ___ I am settled, I’ll go there. A.As B.Since C.Once D.While
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第3题

Life is often compared ________ a stage by many writers. A.like B.as C.with D.to
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第4题

The Olympic Committee has drawn up strict rules for the sportsmen to ________. A.go by B.go on C.go over D.go after
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