制备复方硫磺洗剂，加入甲基纤维素的主要作用是（）
A.润湿
B.反絮凝
C.助悬
D.保护胶
参考答案：C
. ________French believe_______French is_______most beautiful language in the world.
A．/ ;/ ; a
B．The; /; the
C．/; the; a
D．/; the; the
—Could I borrow your dictionary?
—Of course I _____. [ ]
A. can
B. must
C. should
D. have to
