风管
参考答案:
采用金属、非金属薄板或其他材料制作而成,用于空气流通的管道。
The new teacher is quite ____ Mr Wang. I like her better.
A.different from
B.the same as
C.difference
D.the same to
几种接入切换类型中,不在空闲态发生的是:()
A.接入进入切换
B.接入探测切换
C.接入切换
D.以上都是