基站空调与机房空调相比较,基站只有()无(),机房专用空调全年处于()运行状态。
参考答案:除湿功能;加湿功能;制冷
— Is he still raising money for charity?
— Yes. He never _____ hope of helping poor children. [ ]
A. gives up
B. gives out
C. takes off
D. takes out
税收的增加使IS曲线向右移动。