What do you usually do _____ the evening after supper? [ ]
A. on
B. at
C. of
D. in
答案:D
A.I= ,从上向下
B.I= ,从上向下
C.I= ,从下向上
D.I= ,从下向上
D-SCDMA的频段比GSM低。()
A.是
B.否