三柱塞泵的进排液阀检修时,阀座、阀芯如只更换一件,可以直接进行装配。
参考答案:错
Her car has been very dirty. She has got to _______.
A.get washed
B.wash
C.get washed it
D.get it washed
人体呼吸系统中,对吸入的气体具有温暖、清洁、湿润作用的器官是( )
A.鼻
B.喉
C.气管
D.肺