巨噬细胞的作用有（）
A.释放蛋白溶解酶
B.吞噬原虫及异物
C.形成多核巨细胞
D.形成浆细胞
E.形成脓细胞
参考答案：B, C
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
数字显示有（）和数字信号的数字显示两类。
