1 The cars bring a lot of pollution besides pleasure.
汽车给人们带来了乐趣,同时带来了污染。
2 Suppose there are 600.000 cars in a city,then how much carbon monoxide do the cars give off ?
假如一座城市有六十万辆汽车, 那么这些车会排放出多少一氧化碳。
3 Buy cars with high quality
买高品质的汽车。.
4 Keep the engines going on when they are waiting for someone or caught in the traffic jam
等人或堵车时,发动机不要熄火。.
5 What will happen to the scientists' new car engines?
这些科学家们研制出来的新汽车发动机的前景如何?
6 They will disappear from the market for they aren't helpful for pollution control.
它们会退出市场,因其无助于对污染的控制。
1汽车带来很多的污染除了乐趣。
2个假设有600辆汽车在一个城市,然后多少一氧化碳的汽车发出?
3购买汽车高质量。
4引擎继续去当他们等待某人或遇上了交通阻塞。
5会发生什么的科学家的新汽车发动机?
6他们将从市场上消失的不利于污染控制。