2018-2019人教新目标高中英语选修六课时巩固提升 unit 4 period 1 word版含答案
4页1、温馨提示: 此套题为Word版,请按住Ctrl,滑动鼠标滚轴,调节合适的观看比例,答案解析附后。关闭Word文档返回原板块。课时巩固提升Global warming happens when greenhouse gases trap heat and light from the sun in the earths atmosphere, which increases the temperature. This is like when heat is trapped in a car. On a hot day, the car gets hotter when it is out in the parking lot. This is because the heat and light from the sun can get into the car by going through the windows, but it cant get back out. This is what the greenhouse effect does to the earth. The
2、 heat and light can get through the atmosphere, but it cant get out. As a result, the temperature rises. Sometimes the temperature can change in a way that helps us. The greenhouse effect makes the earth suitable for people to live on. Without it, the earth would be freezing, or it would be burning hot. It would be freezing at night because we would not get the suns heat and light. During the day, especially during the summer, it would be burning because the sun would be up with no atmosphere to
3、 filter(过滤)it, so people, plants, and animals would be exposed to all the light and heat. Although the greenhouse effect makes the earth able to have people living on it, if there are too many gases, the earth can get unusually warmer, and many plants, animals and people will die. Plants would die because they would not be able to take the heat. This would cause us to have less food to eat, and it would also limit the food that animals have. With less food for the animals that we need to survive
4、 we would even have less food. Gradually, people, plants, and animals would all die of hunger. People are doing many things to try to stop global warming. One thing is carpooling-driving with someone to a place that you are both going to. Another thing is being more careful about leaving electrical devices turning on. Now, more people are even riding buses or bikes to lower the amount of greenhouse gases in the air. Although adults do many things to help stop global warming, kids can do just as
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