热水供暖系统应在热力入口处的供、回水总管上（）
A.只设温度计
B.只设压力表
C.只设除污器
D.设温度计、压力表、除污器
参考答案：D
用所给单词的适当形式填空。
1. Which do you like _____ (well), apples, pears or bananas?
2. The Yellow River is the second _____ (long) river in China.
3. Which book is _____ (expensive), this one or that one?
4. Bill is one of the _____ (fun) boys in our class.
5. This desk is _____ (heavy) of all.
门德尔松写作了出色的清唱剧作品（）。
A.《基督的童年》
B.《拉撒路》
C.《伊利亚》
D.《赎罪》
E.《圣保罗》
F.《圣伊丽莎白轶事》
