弱碱性树脂的交换能力随进水pH值的上升而（）。
A.上升
B.不变
C.下降
D.无法确定
参考答案：C
─Which TV show talks about studying?
─.
A. Entertainment B. Children’s programs C. Educational programs
28．The government had hoped to draw as much attention as possible to this problem but it didn't ______ that way．
A．work out
B．give out
C．go out
D．pick out
