闭式水系统的定压点宜设在( ),定压点最低压力应( )系统最高点压力。 A.循环

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问题:

闭式水系统的定压点宜设在( ),定压点最低压力应( )系统最高点压力。

A.循环水泵的出水处,高于
B.循环水泵的出水处,低于
C.循环水泵的吸水处,高于
D.循环水泵的吸水处,低于

考点:注册公用设备工程师暖通空调专业知识暖通空调专业知识
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BEIJING—Chinese Premier Wen Jiabao has visited the "left-behind"(留守) children whose parents are working in cities before Children's Day.

During a visit to northwest China's Shanxi Province, Wen visited the home of Yang Saike, a primary school boy in a village of Xingping City. Yang, whose parents were working in Fujian, thousands of kilometers away, was cared for by his grandparents. His parents fail to go home even once a year. Wen talked with many children and asked them many questions about their schooling and life.

"You are so pretty," Wen said to Liu Mengqi, a seven-year-old girl living with her grandmother. Liu's parents were also working in the city.

"Have you been to school yet?" Wen asked two other girls.

"We are going to the pre-school class," said one.

"Mom and dad at home?" Wen asked. The children shook their heads.

"Children cannot see their parents very often, which is a new problem in the country-side. We should give them more care and love," said the premier.

The premier asked local governments to do something to protect and care for such children at home and freeing their parents in cities from worries about their children.

小题1:Wen says a new problem in the country is that "left-behind" children _________.

A.seldom get care from the government

B.seldom get together with their parents

C.cannot do well in school like others.

D.cannot get any love from their parents小题2:Wen Jiabao asks local governments_________.

A.to do more for "left-behind" children and their parents

B.to let the parents see their children only once a year

C.to stop the local people from going to work in cities

D.to build more schools for the "left-behind" children小题3:The proper title (标题) for this passage is "Give ________ more love".

A.poor children

B.disabled children

C.country children

D.'left-behind' children

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为了探索外界条件对反应的影响,以X和Y物质的量比为a:b开始反应,通过实验得到不同条件下达到平衡时Z的物质的量分数,实验结果如下图所示。以下判断正确的是

[ ]

A.△H>0,a+b>c

B.△H>0,a+b<c

C.△H<0,a+b>c 

D.△H<0,a+b<c

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煤粉中保持1%-2%的水分可促进燃烧。

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给予合理营养与平衡膳食下列哪项不正确

A.合理烹调,减少营养素损失

B.良好的饮食习惯有助于儿童达到膳食平衡

C.合理搭配各种食品,以刺激儿童食欲

D.早餐和午餐应安排富含蛋白质和脂肪的食物

E.儿童每餐进餐时间应为20~30分钟

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患者,女,50岁。掌指和腕关节反复肿痛2年余。近1个月病情加重,晨起时出现关节僵硬,活动后可缓解。首先考虑的诊断是()

A.风湿性关节炎

B.痛风

C.强直性脊柱炎

D.骨关节炎

E.类风湿关节炎

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