液压泵盖端面磨损后,应该以()或研磨的方法整平
A.刨削
B.铣削
C.镀铬
D.磨削
参考答案:D
Would you please _____ for the old woman, young man?
[ ]
A. make a room
B. make room
C. making a room
D. make rooms
什么叫胶印的理想压力,影响胶印理想压力有哪些因素?