从探测站到铁路局车辆运行安全监测站的数据传输延时应小于（）。
A.1min
B.2min
C.2s
D.1s
参考答案：A
He’s looking for a new job, one _____ he can get more money to support his family.
A．when
B．where
C．that
D．which
假设某班产量为7500t，耗电量为15000Kwh，那么该班电单耗为（）Kwh/t。
A.2.14
B.2.00
C.2.10
D.1.95
