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【单选题】

伞形采暖器通常带有:倾倒保护、()、缺氧保护。

A.
预热器
B.
输气管
C.
炉膛
D.
熄火保护
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题目标签:采暖倾倒
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参考解析:
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【单选题】How can we get rid of garbage (垃圾) Do we have enough energy sources to meet our future energy needs These are two important questions that many people are asking today. Some people think that man migh...

A.
The shortage of energy and air pollution.
B.
The shortage of energy and the land to hold garbage.
C.
Air pollution and the shortage of fossil fuel.
D.
Air pollution and the shortage of land to hold garbage.

【单选题】该写字楼的采暖方式为( )。

A.
局部采暖
B.
区域采暖
C.
分区采暖
D.
集中采暖

【单选题】采暖管道设坡度主要是为了()。

A.
便于施工
B.
便于排气
C.
便于放水
D.
便于水流动来源