一块冰漂浮在水面上，当冰块全部融化时，杯内的水面将[ ]
A． 上升
B． 下降
C． 不变
D． 无法判断
答案：C
The exhibition is always changing. It will ________ those who love Impressionist and Post-impressionist paintings.
A．be appealed to
B．be attracted to
C．attract to
D．appeal to
分散除尘系统的特点是（）。
A．系统风管较短
B．布置简单
C．系统压力容易平衡
D．初投资大
