问题 选择题

善于梳理化学知识,能使你头脑更聪明。以下有错误的一组           (       )

A化学变化中的能量变化B初中化学中常见的“三”
蜡烛燃烧——放热反应

碳还原二氧化碳——吸热反应

三种可燃性气体——H2、CO、O2

构成物质的三种基本粒子——分子、原子、离子

C化学与安全D化学与能源
进入未开发的溶洞探险——用火把照明

清理沼气池——用火把照明

煤、石油、天然气——不可再生的化石燃料

风能、核能、太阳能——未充分利用的绿色能源

 

答案

BC

A、蜡烛燃烧发光发热,碳还原二氧化碳需在高温条件下进行,是吸热反应.

B、氢气、一氧化碳具有可燃性,但氧气不具有可燃性,有助燃性,三种可燃性气体的说法错误,而构成物质的微粒有三种,分别是分子、原子和离子.

C、溶洞中可能含有大量二氧化碳,不支持燃烧,不供给呼吸,故应用火把照明检测二氧化碳的含量,沼气池中含有可燃性气体甲烷,遇明火可能发生爆炸,所以不能用用火把照明.

D、煤、石油、天然气是三大不可再生化石燃料,风能、核能、太阳能是未充分利用的绿色能源.

故选BC

填空题
阅读理解

C

With alarming regularity, we read about oil tankers having accidents near land and the terrible consequences of the oil spills (泄露) on people, nature, and the environment.

Millions of dollars have been used in developing special chemicals to help dismiss the spills and to clean up the animals, beaches, and land spoiled by the oil.Unfortunately, when many of these chemicals are used, more damage is caused to the environment, especially to lives in the sea.

Of all of today's environmental disasters, an oil spill may actually be one of the least serious.Although oil is poisonous, it is a natural material.In the end, it breaks down naturally.There are, of course, long-term effects, but it is usually more serious in the short term.

Nature by itself works better than chemical materials, but when there is a spill we demand that governments act immediately with as much hi-tech knowledge as possible.In 1967 the tanker Torrey Canyon sank off the Scilly Isles near the coast of England and spilled 120,000 tones of oil into the ocean.If you go there today, you will find it hard to see any sign that it ever happened.

Governments seem to accept the risk of transporting millions of tons of oil by ship every day so that we can fill up our cars and drive around and cause even more environmental damage.Interestingly, the biggest companies in the world produce cars, and the next biggest supply the gasoline to make them run I

We should be thinking more about reducing our dependency on oil.Governments should be encouraging research into new technologies, such as cars run by solar power (太阳能) , electricity, hydrogen, and so on.Much of this research has, in the past, been held back by the oil, gas, and coal.

If the world's millions of cars were 10% more efficient (高效的)—and the industry could easily produce cars at least twice as efficient ?we would need many fewer tankers crossing the oceans each year.If this happened, the risks of oil spills would be reduced, and the air we breathe would be cleaner and fresher, too.

63.What is the passage mainly talking about?

A.Oil spills pollution.    B.What oil pollution is.

C.Oil tanker accidents.             D.How to reduce oil pollution.

64.How does the author support the idea that oil spills are not as serious as people believe?

A.By giving a description.   B.By making an argument.

C.By giving an example.          D.By drawing a diagram.

65.What does the underlined word "risk" in Paragraph 5 refer to?

A.Transportation depending more on oil.

B.Poisonous oil breaking down naturally.

C.Millions of tons of oil spilling into the sea.

D.More environmental damage being caused.

66.Which suggestion, is made for reducing oil tank accidents according to the passage?

A.We should build safer tankers in the near future.

B.We should develop new technologies to cut oil use.

C.Tankers should not be allowed to sail near the coastlines.

D.Countries should build more oil pipelines under the sea.