∵最简二次根式a+2与5-2a是同类二次根式,
∴a+2=5-2a,解得:a=1.
—Did Betty go shopping with you yesterday?
—Even if she _____ a lot of studying, she would have preferred staying home to going shopping.
A.didn’t have
B.shouldn’t have
C.hadn’t had
D.hasn’t had
垫铁放置有()和()。