当在测试时,一位服务工程师正根据自己大学时课堂的笔记来测试设备。以上事实不符合标准:().
A.4.2.3
B.7.6
C.7.5.3
D.无不符合
参考答案:B
—Why shouldn’t I disturb my brother these days?
—Because he needs to think about job advertised in the paper he can take.
A.how
B.where
C.which
D.that
已知GSM系统的下行频段是:935~960MHz,上行频段是890~915MHz载频间隔是0.2MHz,则第22频道的上行载波频率为(),下行载波频率为()