GSM网络中,某小区BCCH时隙(0时隙)只会对其他小区0时隙形成干扰。
参考答案:错
Working abroad for many years, he has made a big _______ and started a company of his own.
A.difference
B.fortune
C.progress
D.breakthrough
重庆天原化工厂发生氯气泄漏事故,救援人员使用了防毒面具,以下适用于填充防毒面具并吸附毒气的是( )
A.金刚石
B.炭黑
C.活性炭
D.石墨