康佳手机测试中,在GSM段允许的频率误差为();在DCS段允许的频率误差为()。
A.±90,±90
B.±90,±180
C.±180,±90
D.±180,±180
参考答案:B
Only one-fifth of Americans saw oil as the chief mason that the U.S. made a war on Iraq, but 75 percent of the French and of the Russians believed ______.
A.to
B.so
C.go
D.do
键盘上用于大小写字母转换的键是Esc。