题目内容

检验回归系数是否显著(注: ),正确的假设、检验量和结论是()。

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简支梁受力如图,则支座A的反力为()KN。

A. 2.5
B. 5.0
C. 7.5
D. 10

A recover
B review
C require
D remember

I can only stay here for a while, but I’ll come again in ____days.
A a few
B few
C a little
D little

One of the best ways for people to keep fit is to ____ healthy eating habits.
A grow
B develop
C increase
D raise

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