动车组调车作业规定有哪些？

阅读理解。

      No air means death. Though we can't see it, there is air all around us, so air is everywhere and gives life to

every living thing.

      Without it we can't live. Bad air makes people ill. We must have fresh air to keep us in good health.

      In the city there are many people and there are too many cars running on the roads the gas which the cars

spread (传播) out is full of poison (有毒). Every day we breathe it in again and again. This makes us feel sick.

      Besides the cars, there are many factories too. From the chimneys (烟囱) of these factories, we usually get

black and grey smoke. This kind of smoke, when mixed with air, is dangerous to our health because it contains

much poisonous gas. So in order to keep ourselves healthy we should go out to the countryside to breathe more

fresh air.

1. Air is very important because _______. [ ]

A. We can't see it.

B. It is everywhere.

C. It gives life to every living thing.

D. It does no harm to people's health.

2. We must have fresh air to _______. [ ]

A. make our room healthy

B. keep us healthy

C. keep out house clean

D. see every thing clearly

3. The gas which the cars spread out is _______ the black smoke that comes out of the factories. [ ]

A. as grey as

B. as much as

C. as dense as

D. as little as

4. In the city, the air is not so clean as that _______. [ ]

A. in factories

B. out of doors

C. in the countryside

D. indoors

5. We can't get more fresh air when we are in _______. [ ]

A. hills

B. countryside

C. seaside

D. big cities

（1）实验室可用草酸（H₂C₂O₄）在浓硫酸的作用下分解制得一氧化碳和二氧化碳（化学方程式为：H₂C₂O₄CO₂↑＋CO↑＋H₂O）。用到的实验装置见下图：

若分别得到一氧化碳和二氧化碳，请回答：

①装置A中，盛放浓硫酸的仪器名称是           ；

②收集一氧化碳时，打开a、b，关闭c，装置B的作用是           。由于一氧化碳有毒，多余的气体应           （填写具体处理办法）；

③关闭           、打开           ，释放出二氧化碳，并通过装置           可收集到干燥的二氧化碳气体。

（2）在二氧化锰的催化作用下，过氧化氢迅速分解生成氧气和水。哪些因素还影响着过氧化氢分解的速率？课外活动小组结些进行了更深入的探究：

探究实验一：浓度对化学反应速率的影响

实验用品：试管、烧杯、热水、冷水、5%过氧化氢溶液、15%过氧化氢溶液

探究实验二：温度对化学反应速率的影响

唐代思想家柳宗元认为法律起源于（）

A.礼

B.乐

C.兵

D.势

未来经营费用风险，是指物业实际经营管理费用支出( )预期经营费用而带来的风险。

A．小于

B．等于

C．超过

D．无关联

在同一配电线路中不允许一部分接地，另一部分设备接零，这句话对吗？