奔腾Ⅳ的CPU的主频1GHz,等于()
A.1ns-1
B.100ns-1
C.10-1s-1
D.10-9s-1
参考答案:D
—You haven’t seen the film ‘2012’, have you?
—_____. How I wish to see it again!
A.No, what a pity
B.No, I haven’t
C.Yes, I like it
D.Yes, it’s boring
Tom did all _____he could to get on well _____his classmates.
A.which; with
B.that; /
C.that; with
D./; /