安全阀在安装上的要求包括（）。 A.安全阀应铅直安装，并应装在

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问题多项选择题

安全阀在安装上的要求包括（）。

A.安全阀应铅直安装，并应装在锅筒（锅壳）和集箱的最高位置

B.在安全阀和锅筒之间，不得装有取用蒸汽的出汽管及阀门

C.几个安全阀如共同装置在一个与锅简直接相连接的短管上，短管的流通截面应不小于所有安全阀流通截面积之和

D.对于额定蒸汽压力小于3.8MPa的锅炉，安全阀的流道直径不应小于25mm

答案

参考答案：A, B, C, D

阅读理解

阅读理解。

It is Saturday afternoon. Liu Tao and his friend David are taking a walk in the park. There are many

public signs in it. They mean different things. Liu Tao knows a lot of things about them. Suddenly, they

see a short man walking on the grass. Liu Tao points to the sign on the grass and says to him, "Sir, look

at the sign! You can't walk on the grass. "The man smiles and says, "You are right, young man. But I'm

the park keeper. I'm looking after the grass."

根据短文内容，判断下列句子正(T)误(F)。

( )1. It is Saturday afternoon.

( )2. The boys can see many public signs in the park.

( )3. Liu Tao doesn't know the things about the public signs.

( )4. The man can't see the public signs in the park.

( )5. The man is the park keeper. He wants to take a walk on the grass.

单项选择题

稽察人员与被稽察项目之间的关系是( )。

A．监督与被监督
B．平等的民事主体
C．委托合同
D．行政管理与被管理