ZP•Y2-18型移频自动闭塞区间电源屏应提供48V±1V的稳定电压,杂音电压应于()mV。
A、90
B、95
C、100
D、120
参考答案:C
—Why so early? The movie doesn't start till seven.
—I don't want to be at the traffic there.It's terrible during the rush hour.
A.have you left
B.do you leave
C.would you leave
D.are you leaving
选择报纸刊登广告的好处包括( )。
A.为公司做了广泛宣传
B.成车低且查询方便
C.信息传播速度快
D.广告大小可是活选择
E.保存时间较长