学校文印室需要复印6张资料,正反面都要复印.如果一次最多能复印2张,至少需要复印______次.
6×2÷2=6(次);
答:至少需要复印6次.
故答案为:6.
—Why didn't you come to Mike’s birthday party yesterday?
---Well, I ____, but I forgot it.
A.should
B.must
C.should have
D.must have
通常情况下,用户是通过局域网系统上Internet的。( )