The new-designed car is on show now. I wonder ___________.
A:how much it cost
B:how much it costs
C:how much did it cost
D:how much does it cost
如图5是电热水器、洗衣机等用电器使用的三脚插座和插头,它们可以使用电器外壳接地,这样做的目的是()
已知集合A=x|x2-5x+6≤0,集合B=x|2x-1>3,则集合A∩B=( )