【单选题】适用于低、中压空调系统及潮湿环境,,但对高压及洁净空调、酸碱性环境和防排烟系统不适用的风管,一般用()制成。
【单选题】— We'd like some chicken, please. — ______ We have no chicken now. [ ]
D.
Why do you want chicken?
【单选题】—_____? —I'm tall and medium build. [ ]
【单选题】适用于低、中压空调系统及潮湿环境,但对高压及洁净空调、酸碱性环境和防排烟系统不使用的风管,一般用( )制成。