水泵轴常在与衬套、水封配合处产生磨损,磨损不严重时可以更换(),恢复间隙。
参考答案:衬套
布身呈凹凸状泡泡的薄型棉织物是
A.麻纱
B.泡泡纱
C.乔其纱
D.双绉
This kind of bike looks and sells . [ ]
A. nice, well
B. nice, good
C. well, well
D. good, nice