题目内容

________ of minerals, which are chemical elements or compounds of varying purity .

A．The consistency of rocks　 B． Rocks, consisting

C．Rocks consist　　　D． Whereas rocks consist

答案：C
提示：

　　此句话显然缺少主语和谓语。


练习册系列答案
相关题目

Scientists are closely concerned with the structure of buildings and with the quality of building materials． The World health Organization （WHO) observes that the introduction of air conditioning and energy conservation （保护) measures have been accompanied by growing problems of indoor air quality． Some pollutants arise from insulation （隔音) products, some from moving cars, and others from modern housing materials． As many Europeans spend up to 90% of their lives in buildings, the health effects of the indoor climate are very important．
　　Some construction materials, including fiberboard, insulation foams and certain glues for man-made wood floor boards, for example, give out organic products such as formaldehyde （甲醛)． Heat and humidity increase the release of formaldehyde and the gas seriously harms the eyes． Paint, lacquer, etc． can also release dangerous gas into indoor air．
　　Construction materials can cause serious damage, especially when they contain asbestos（石棉）． Asbestos is naturally present in rock formations worldwide． It belongs to a family of mineral substances made up of solid, non-combustible（非易燃品） fiber． These properties make asbestos a highly sought-after construction material． As early as 1931, however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer．
　　The land on which a building is sited may also contribute to pollution． Some kinds of granite or similar rocks contain traces of radium． As it breaks down, this naturally radioactive element produces some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms． The better the homes are insulated, the more is the dangerous gas in indoor air． The main effect of this dangerous gas on health is to increase the risk of lung cancer．
【小题1】What is the main idea of the passage?

A．Some building materials pollute indoor air．
B．Some factors cause indoor air pollution．
C．Asbestos can cause lung cancer．
D．The land on which houses are built contributes to indoor pollution．
【小题2】Why are Europeans particularly concerned with building materials?
A．Lots of building materials there are radioactive．
B．They stay home up to 90% of their lives．
C．They have a high rate of lung cancer．
D．They spend most of their time indoors．
【小题3】Why is asbestos a sought-after building material?
A．It is a kind of insulation foam．
B．Asbestos will not give out dangerous gas．
C．This material is not easy to catch fire．
D．It is rarely present in rock formations．
【小题4】Why should we be careful about the land on which a building is to be sited?
A．To determine whether the land is firm enough for a building to be sited on．
B．To make sure that the land contains no radioactive material．
C．To make certain that the land releases no formaldehyde or other gases．
D．To check whether it contains any combustible materials．


Something big is happening to the human race, something that could be called the Great Transformation.
The Transformation consists of all the changes that are occurring in human life due to advancing technology. For thousands of years such progress occurred slowly. Now everything is changing so fast that you may find yourself wondering where all this progress is really leading.
Nobody knows what all these changes will really mean in the long run. But this mysterious Transformation is the biggest story of all times. It is the story of the human race itself.
Some people worry about what will happen when the deposits(蕴藏)of petroleum are gone, but already researchers are finding all kinds of new ways to get energy. Someday, solar power collected by satellites circling the earth or fission(裂变) power produced by mankind may give us all the energy we need for an expanding civilization(文明).Space exploraton promises to open up much new land for human settlement, as well as leading to the harvest of mineral resources.
Like it or not, our advancing technology has made us masters of the earth. We not only control all the other animals, but also reshape the world’s plant life and even its soil and rocks, its waters and surrounding air.
Technology gives us the power to build a great new civilizaion, if we can just agee on what we want it to be, bu today, there is little global agreement on goals and how we should achieve them.
So it remanins to be seen what will happen as a result of our technology. Pessimists(悲观主义者) worry that we will use the technology eventually to blow ourselves up. But they have been saying that for decades, and so far we have escaped. Whether we will continue to do so remains unknown, but we can continue to hope.
68.The Great Transformation is caused by ________.
A. changes in human life    B.the development of science and technology
C. space exploration        D. unknown reasons
69.Today it is impossible for people to build a remarkable new civilization because __________.  A.nobody is optimistic about the future
B.human beings aare unabale to do so
C.people diagree with each other in many ways
D.people are worried too much
70.Advancing technology could possibly make us_______.
A.hesitate    B.decisive      C.powerless      D.mysterious

As rain begins to fall from the clouds, it is very pure. However, as it falls through the air it dissolves some of the gases in the air ,It also collects bits of dust and microbes(微生物)that are floating in the air, When the rain reaches the ground it begins to pick up more dust and dirt, Many kinds of mineral substances dissolve in the water ,Sand and nud cannot dissolve in water.

Since water is so important to us, it is very important that the water we use should be clean , Otherwise, we might get some of the diseases that are carried by water Many microbes are harmful ,They are so small that we cannot see them ,These microbes must be removed or killed before the water is not clean, people who drink this water may get these diseases, Thus , to provide people with clean water, the government purifies the water.

Purification is a long process and consists of three stages: storing ,purifying and distributing ,The first stage is storing , Man-made lakes called reservoirs are used for this purpose ,Water from the rains ,other lakes, streams and rivers is collected in the reservoirs ,This water is usually dirty and muddy.

In the second stage shich is purifying , water from the reservoirs is filtered in a special pond, Stones, sand and other unwanted tiny things are caught in it, After that, tiny microbes are still present in the water ,These microbes are removed by “airing ”the water and by adding a chemical substance called chloring(氯)to the water ,This kills all the microbes in the water ,A fter this the water can be safely used for drinking.

The third stage is the distribution of the purified water to homes ,hospitals, offices ,factories and other places, This is done through a network of pipes of various sizes, These pipes must be make of a suitable material.

1.From Paragraph 1, we can learn that           

A、Rain has contained gases when it forms in the clouds

B、Dust and microbes are dissolved in rain when rain falls on the ground

C、The closer rain is to the ground, the more impure things it contains

D、Sand and mud are things rain collects when it falls through the air

2.According to Paragraph 2 ,the following statements are wrong except that        

A、All the microbes in water are harmful so water must be purified

B、some diseases can spread through drinking water if it is not clean

C、Water is safe to drink if only harmful microbes are removed from it

D、it is the govrnment’s responsibility to make drinking water clean

3.What can we know about man-made lakes?

A、It is used through the whole process of purification

B、Only rain water can be collected and stored in it

C、Water collected can be stored and filtered in it

D、Water from them contains a lot of impure substances

4.What is the function of the chemical substance chlorine?

A、to air the water            B、to catch tiny things

C、to kill microbes             D、to remove harmful gases

5.What is probably this passage?

A、A news report     B、A book review     C、A magazine article       D、A school paper

 

Scientists are closely concerned with the structure of buildings and with the quality of building materials． The World health Organization （WHO) observes that the introduction of air conditioning and energy conservation （保护) measures have been accompanied by growing problems of indoor air quality． Some pollutants arise from insulation （隔音) products, some from moving cars, and others from modern housing materials． As many Europeans spend up to 90% of their lives in buildings, the health effects of the indoor climate are very important．

　　Some construction materials, including fiberboard, insulation foams and certain glues for man-made wood floor boards, for example, give out organic products such as formaldehyde （甲醛)． Heat and humidity increase the release of formaldehyde and the gas seriously harms the eyes． Paint, lacquer, etc． can also release dangerous gas into indoor air．

　　Construction materials can cause serious damage, especially when they contain asbestos（石棉）． Asbestos is naturally present in rock formations worldwide． It belongs to a family of mineral substances made up of solid, non-combustible（非易燃品） fiber． These properties make asbestos a highly sought-after construction material． As early as 1931, however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer．

　　The land on which a building is sited may also contribute to pollution． Some kinds of granite or similar rocks contain traces of radium． As it breaks down, this naturally radioactive element produces some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms． The better the homes are insulated, the more is the dangerous gas in indoor air． The main effect of this dangerous gas on health is to increase the risk of lung cancer．

1.What is the main idea of the passage?

    A．Some building materials pollute indoor air．

    B．Some factors cause indoor air pollution．

    C．Asbestos can cause lung cancer．

    D．The land on which houses are built contributes to indoor pollution．

2.Why are Europeans particularly concerned with building materials?

    A．Lots of building materials there are radioactive．

    B．They stay home up to 90% of their lives．

    C．They have a high rate of lung cancer．

    D．They spend most of their time indoors．

3.Why is asbestos a sought-after building material?

    A．It is a kind of insulation foam．

    B．Asbestos will not give out dangerous gas．

    C．This material is not easy to catch fire．

    D．It is rarely present in rock formations．

4.Why should we be careful about the land on which a building is to be sited?

    A．To determine whether the land is firm enough for a building to be sited on．

    B．To make sure that the land contains no radioactive material．

    C．To make certain that the land releases no formaldehyde or other gases．

    D．To check whether it contains any combustible materials．

 

 

 

第二卷

I. 单词拼写。 根据汉语或首字母的提示写出单词，使句子完整与正确。(一词一空，共10小题，计10分)

1. You are quite right. We t__________ agree with your opinion.

2. I dislike him personally, but I a_________ his art.

3. Sea water c__________ many kinds of mineral(矿物质), including salt.

4. The farmer was in danger because he was b________ by a snake this morning.

5. It is said that the band will come here to give a p_________ at the concert for the children.

6. Robots are gradually ______( 代替 ) humans in many factories in Japan.

7. The first day of _________(八月) is Army Day in China.

8. The policemen asked the two _______(过路人) about the traffic accident.

9. Sanya is so ____(诱人的) in winter that a large number of visitors come to spend their holiday.

10. Nowadays many students use ____________(电子的) dictionaries to look up new words .

 

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网