碱减量促进剂一般属于（）。
A.阴离子型
B.阳离子型
C.非离子型
参考答案：B
A wellwritten composition ________ a good choice of words and clear organization among other things.[ ]
A. calls on
B. calls for
C. calls up
D. calls off
I don’t want ( )sugar in my Coffee.
A．any
B．some
C．a
D．no
