热水热力网的回水压力与()条件无关。 A.热水热力网循环水泵运行和停运时,应保证用户

题型:单项选择题

问题:

热水热力网的回水压力与()条件无关。

A.热水热力网循环水泵运行和停运时,应保证用户系统内部充满水

B.不应超过间接连接的用户系统的容许压力

C.热水热力网循环水泵运行和停运时,应防止用户系统各低点的压力过大

D.热水热力网任何一点的压力不应低于50kPa

考点:注册设备工程师(暖通空调)暖通工程师基础考试暖通工程师基础考试题库
题型:单项选择题

Do you want to be the most popular person in the class? You don’t need to change your character; you just need to improve your personality (人格). In fact, people trust and love the most popular people because they stay normal but still have something that makes them different from the rest of us. Here are some pieces of advice about becoming the most popular person in the class.

◆If you want others to like and respect (尊重) you, you have to start by liking and accepting yourself. Do not change yourself in order to please others.

◆Be helpful to everyone and do it happily. Being nice to people is almost like helping them, because by being nice you make others happy.

◆Be active and have a positive view towards life. Develop confidence in yourself.

◆Stay clean and wear fresh clothes. Do not try to follow fashion to please others.

◆Big words and power cannot bring you respect. You have to get it by being honest. It also helps your personal growth. You must be a person that can be trusted to get respect.

小题1:If you want to become the most popular person, you should __________.

A.improve your personality

B.trust and please others

C.change your character

D.make yourself different from others小题2:According to the article, __________ can bring you respect.

A.following fashion

B.using big words

C.being honest and helpful

D.saying hello to others every day小题3:The underlined sentence shows that __________.

A.you should be polite when you help others

B.you should make yourself happy[

C.we can help others only by being happy

D.you should always be nice to others

题型:单项选择题

下列不属于计时观察法的主要内容和要求的是( )。

A.对施工过程进行观察、测时
B.计算实物和劳务产量
C.记录施工过程所处的施工条件
D.确定劳动生产率

题型:单项选择题

直角三角形ABC的面积为24cm2,直角边AB为6cm,∠A是锐角,则sinA=( )

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由于先天性遗传突变或人工诱导方法建立的一种或多种免疫系统组成成分缺陷的动物称为:()

A.抗疾病动物模型

B.生物医学动物模型

C.遗传工程动物模型

D.免疫缺陷动物模型

题型:单项选择题

在固体矿产资源储量分类与编码表中,预测的资源量编码是()。

A.2S22

B.2S21

C.334

D.333

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