压缩机的气缸、活塞、气阀、填料等部件的总称叫做（）
参考答案：压缩部分
Plans have been proposed ___ the largest dam in the world to be built along the Congo river．
A．of
B．with
C．for
D．on
患者初始的烧伤深度为
A．轻度烧伤
B．I度烧伤
C．浅Ⅱ度烧伤
D．深Ⅱ度烧伤
E．Ⅲ度烧伤
