关于机械能是否守恒的叙述，正确的是[ ] A.做匀速直线运动的物体机械能一定守恒

The students were having their chemistry class. Miss Li was telling the children what water was like. After that, she asked her students, “What’s water?” No one spoke for a few minutes. Miss Li asked again, “Why don’t you answer my question? Didn’t I tell you what water is like?”

Just then a boy put up his hand and said, “Miss Li, you told us that water has no color and no smell. But where can we find such kind of water？The water in the river behind my house is always black and it has a bad smell.” Most of the children agreed with him.

“I’m sorry, children,” said the teacher. “Our water is getting dirtier and dirtier. That’s a problem.”

小题1:Miss Li was a _______ teacher.

A．English

B．Chinese

C．chemistry

D．math小题2:Miss Li was telling the children what ______ was like.

A．water

B．air

C．earth

D．weather小题3:A boy said, “The water in the river behind my house is always _______.”

A．white

B．black

C．clean

D．clear小题4:Most of the children _______ the boy.

A．agreed with

B．wrote to

C．heard from

D．sent for小题5:The water in the river has color and smell because it is getting _______.

A．more and more

B．less and less

C．cleaner and cleaner

D．dirtier and dirtier

关于医院污水处理，下列论述正确的是（）

A.仅需一级处理

B.一级处理、二级处理可满足要求

C.医院污水处理中污泥可作为肥料

D.医院污水中放射性物质不需处理

E.医院污水消毒后方可排放

张掖县解放后，军管会和县委、县政府对城乡基层 * * 进行系统改造，废除保甲制度，建立新的 * * 组织。全县共建立多少个区，多少个乡，多少个村？

CRH380A统型动车组辅助变压器（ATr）的作用？

冯•诺依曼计算机的体系结构主要分为（）五大组成。

A.外部存储器、内部存储器、CPU、显示、打印

B.输入、输出、运算器、控制器、存储器

C.输入、输出、控制、存储、外设

D.以上都不是