检验回归系数是否显著(注: ),正确的假设、检验量和结论是()。
查看答案
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