在机械制图中，一般要求字体为：（）
A.仿宋体
B.宋体
C.长仿宋体
D.黑体
参考答案：C
The electronic computer is ______ some of the tasks that were once accomplished by our own brains.
A. taking care B. taking in C. taking off D. taking over
在自动闭塞、半自动闭塞区段，出站信号机若显示两个绿色灯光时其含义是什么？
