局部空调机组按空调机组的用途分类，可分为（）。
A.房间空调器
B.水冷式空调机组
C.恒温恒湿空调机组
D.冷风机组
参考答案：A, C, D
Don't just wait _____. You should try to seek for information you need. [ ]
A. to inform
B. to be informed
C. for informing
D. for being informed
企业怎样建立和运行质量体系？
