避难走道()防火分区。
A.不划分
B.最多划分两个
C.最多划分三个
D.按面积实际划分
参考答案:A
As a role model, I don’t think most people can imagine what it’s like ____that close every minute of the day.
A.to be watched
B.watched
C.watching
D.to watch
仪用放大器构成包括()
A、同相放大器
B、反向放大器
C、减法器
D、加法器