关于新生儿肺透明膜病，下列哪项是错误的（） A.仅见于早产儿 B.胎龄愈小，发病率愈

下列除哪项外，其余都说明家鸽的外形与飞行生活相适应？（　　）

A．全身被羽

B．身体分头、颈、躯干、四肢、尾

C．身体呈流线型

D．前肢变成翼，具有几排大型正羽

阅读理解。

     Air pollution comes from factories, power stations and cars. Chemicals in the smoke from power stations

cause a lot of damage (损害；毁坏). They can travel hundreds of miles in the wind before falling to the ground

in the rain. And this"chemical rain" gradually (逐渐地) destroys trees in the forests and kills fish in the lakes. In Germany, over 50% of the country's trees had been damaged by the year 1986.

     Time and time again there are serious accidents that pollute the air. In 1986 there was a serious accident at

a nuclear power station in Russia. A cloud of radiation flew across the whole Europe. It is said that 125,000

people died in Russia as a result of illness caused by this accident.

     In 1984 there was a serious accident at a factory in India and a cloud of dangerous gas covered the town

of Bhopal. Over 2,500 people were killed that night, and hundreds of thousands of people were injured (受伤

的). Many of the injured lost their sight.

1. Air pollution comes from _____.

A. factories

B. power stations

C. cars

D. all of the above

2. According to the passage, which sentence is right?

A. Chemicals in the smoke from power stations can't travel far in the wind.

B. "Chemical rain" is good for the trees.

C. Chemicals in the smoke from power stations are very safe.

D. "Chemical rain" is bad for our environment.

3. In Germany, how many trees had been damaged by the year 1986?

A. A quarter.

B. A half.

C. Three quarters.

D. A third.

4. What was the result of the accident that happened in Russia in 1986?

A. Over 2,500 people were killed.

B. Many people couldn't walk.

C. Many people lost their sight.

D. Compared with (同……比较) the accident in India, more people died.

5. From the sentence"Many of the injured lost their sight." we can know _____.

A. the gas covered the town of Bhopal at that time was poisonous (有毒的)

B. gradually the injured could see everything

C. many of the injured couldn't see anything any more

D. Both A and C

简述IT外包的主要优点。

蛋糕面糊因（）原因可能导致成品体积小。

A.搅打速度快

B.蛋液温度过低

C.糖多

D.水分不足

怠速时，变速器换入空档有响声，踩下离合器踏板下，响声消失，表明（）有故障。

A.变速器

B.离合器

C.变速器操纵机构

D.离合器操纵机构