I think computer houses aren't good place _____ hang out.[ ]
A. for
B. on
C. to
答案:C
光缆中断时朗讯光传输设备一定会亮的告警灯是()
A、PROMPT
B、INFO
C、DEFAULT
D、对应的Rx
视准轴误差、横轴倾斜误差、竖轴倾斜误差它们产生的原因和消除办法是什么?