问题 填空题

氨属()、()、(),氨有毒,有刺激性和()的气体,容易挥发,氨泄露至大气中,扩散到一定的范围,易造成急性中毒和灼伤,

答案

参考答案:可燃;易燃;有毒物质;恶臭味

阅读理解

阅读短文,选择正确答案。

     More and more people like bicycling and it is no surprise. It is fun, healthy and good for the environment.

Maybe that's why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes can

take you almost anywhere, and there is no oil cost! 

     Get on a bicycle and ride around your neighbourhood. You may discover something new all around you.

Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work and

benefit (受益) from the enjoyable exercise without polluting the environment. You don't even have to ride all the

way.

     Folding (折叠) bikes work well for people who ride the train. Just fold the bike and take it with you. You can

do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a common bike with

you when you fly. But be sure to look for information by getting on airline websites. Not all airlines are

bicycle-friendly to travellers. 

     Health Benefits of Bicycling: 

    ● It helps to prevent heart diseases.

    ● Bicycling helps to control your weight. A 15-minute bike ride to and from work three times a week burns

off five kilos of fat in a year. 

    ● Bicycling can improve your mood (心情). Exercise like bicycling has been shown to make people feel

better, more relaxed and self-confident.

    ● Bicycling is healthier than driving.

1. From the passage, we know that bicycling is becoming very _______. [ ]

A. surprising

B. exciting

C. expensive

D. popular

2. When you are riding your bicycle around your neighbourhood, you may _______. [ ]

A. pollute the environment around

B. find something you didn't notice

C. go everywhere and use a little oil

D. get off your bike and begin to work

3. If you travel with a folding bike, you can fold it and _______. [ ]

A. get out of the car

B. take it onto a train

C. put it in your purse

D. go on airline websites

4. One of the benefits from bicycling is that _______. [ ]

A. you can fold the bicycle

B. you will be friendly to others

C. you will be more relaxed

D. you may get fatter and fatter

5. Which is TRUE according to the passage? [ ]

A. Bicycling is enjoyable exercise for people.

B. Driving cars is healthier than riding bikes.

C. Riding a bike pollutes your neighbourhood.

D. Common bikes are welcomed by all airlines.

判断题