活塞式压缩机气缸的润滑是通过多柱塞得注油器进行（）。
参考答案：强制润滑
麻疹的诊断依据是（）
A.有麻疹接触史
B.出疹顺序
C.卡他症状
D.发热与出疹无关
E.Koplik’s斑
As we are _____ Table Cloth, we should be pleased if you would send us your best quotations.
A．in the market forB．on the market forC．entering the market for D．at the market for
