A.控制键(Ctrl)
B.滚屏锁定键(Scroll Lock)
C.数字锁定键(Num Lock)
D.大小写转换键(Caps Lock)
A.12345
B.20170501
C.Hello
D.Hel-7-lo
A.按了<Caps look>键,使得输入的是大写字母
B.按了<Scroll lock>功能键
C.按了<Num lock>转换键键
D.按了<Shift>上档键
A.Hel_7_lo
B.12345
C.xiaoding
D.Hello
A.Hotm_8902
B.12345
C.Xiaoding
D.Hello