【单选题】【消耗次数：1】
试问在下述有关机械循环热水供暖系统的表述中，（ ）是错误的。
①
供水干管应按水流方向有向上的坡度
②
集气罐设置在系统的最高点
③
使用膨胀水箱来容纳水受热后所膨胀的体积
④
循环水泵装设在锅炉入口前的回水干管上
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
The license must be clearly __________ in the car windscreen.
①
spread
②
displayed
③
exposed
④
located
【单选题】
__________ my love of landscape, nothing could persuade me to spend another day in the Highlands.
①
But for
②
For all
③
Above
④
Except for
【单选题】
Food was in short __________ ; women stood in line for hours for a bucket of drinking water.
①
store
②
provision
③
reserve
④
supply
【单选题】
His parents __________ him the opportunity to go to university.
①
ignored
②
neglected
③
refused
④
denied
【单选题】
Graceland, Elvis Presley’s former home, is now a tourist __________ that draws more than 600,000 visitors every year.
①
store
②
attraction
③
appointment
④
arrangement
【单选题】
Great changes __________ in our institute in the last few years.
①
have taken place
②
has taken place
③
took place
④
had taken place
【单选题】
-- Sorry I kept you waiting.
①
I’m sad
②
I don’t care
③
That’s all right. There’s no hurry
④
No, not at all