We all know that light can help us see. However, nowadays humans are using too much of light so that light actually becomes a kind of pollution.
For example,when we watch the night sky, too much light makes it difficult for us to see some most wonderful sights in our life: stars, planets and beautiful meteors.
Based on(根据) some scientific researches, about 2, 500 stars can be seen by human eyes without using any special equipment(设备). But as the result of the light pollution, we could only see 200 to 400 stars from the countryside, and less than twenty stars from a city. In some big cities, people may never see a sky filled with stars like they did when they are children.
Light pollution have bad effects on more than just our view of sky. The research shows that lots of light in the night could do harm to wildlife, too.
When birds fly over cities for moving to another place, they sometimes lose their way by the brightness and fly in circles(圆圈) until they drop because of tiredness. Sea turtles need dark beaches to lay their eggs, but they can’t find ideal places with those bright lights.
Too much light at night may even harm human health, but scientists are not sure of that. They are still doing more researches to prove(证明) that.
Fortunately, governments and some social organizations are trying to reduce(减少) light pollution in order to prevent things from going worse. Many cities and towns have taken strong measures to reduce the use of lights at night. Lights now are used only when and where they are really needed. Besides these,people also shine lights down at the ground instead of up into the sky and use lower brightness levels.
Maybe in the near future humans could see the clear and beautiful sky again and I hope that all the wildlife may live a peaceful and undisturbed life.
1. Which of the following is true according to the passage?
A. There are about 2,500 stars in the sky.
B. Something has been done to reduce light pollution.
C. Sea turtles always lay eggs somewhere with brightness.
D. Humans do nothing to reduce light pollution.
2. Which of the following is NOT mentioned(提到)in this passage?
A. The problems that light pollution has caused.
B. The reason why humans use too much light.
C. The ways that light pollution can be reduced.
D. The reason why fewer stars can be seen than before.
3. Why does the writer think that too much light is a kind of pollution?
A. Because there are fewer and fewer stars.
B. Because human health has been affected.
C. Because too much light is a waste of energy.
D. Because some of the wildlife can be harmed.
4. Does the light pollution affect human health?
A. Sure, it does.
B. No,it has no effect on humen health.
C. It may have bad effect on human health, but scientists haven't been sure of it.
D. Not mentioned.
1.B。文章中倒数第二段 Many cities and towns have taken strong measures to reduce the use of lights at night. 告诉我们人类已经开始采取措施来减少污染。故B。
2.B。B项中人们过多的使用电能的原因文章中并没有提及。
3.D。从自然界鸟类的生活受到影响可以得出结论：电能是一种污染。
4.C。只有C项说的比较合理。
发表于 2016-8-4 09:07:00
