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    We can drink water when it is A. a liquid B. a solid C. in the air D. turned into ice 【查看更多】

     

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    　　The earth is our home．We must take care of it．This means keeping the land and water clean．

    　　Pollution is a “dirty” word．To pollute means to make things unfit or unclean to us．Pollution comes in many ways．We use it, smell it, taste it and drink it．Pollution is beginning to threaten our health, our happiness and our life．

    　　Man has been polluting the earth from the time when he first made fire, washed his clothes in the river and threw his waste on the ground．When land was used up or water became dirty, men moved to another place．At first the problem was not so serious because there was plenty of clean air, land and water．There weren't so many people then and their wants were fewer．All the dirty things could be absorbed(吸收)by nature and soon covered over．But this is no longer true．The increase of population and development of industry have changed that．Man is slowly poisoning his surroundings．

    　　Through the use of poison, man has polluted the land, killing the animals．By putting dirty water and chemicals into river and lakes we have polluted our drinking water, killing the fish．

    　　Our increasing population is part of the problem．More people, more waste．

    　　Where is this all to end?Are we turning the world into a big rubbish dump, or is there any hope that we can get rid of the pollution?Fortunately, millions of people have been warned of pollution．Large numbers of people are now working hard to bring pollution under control．

    (1)

    The underlined word “chemicals” means ________．

    [　　]

    A．

    study of gases, liquids and solids to understand how they are made and what they do

    B．

    some who studies chemistry

    C．

    something which causes some chemical change

    D．

    solid or liquid substance used in chemistry

    (2)

    Through the uncontrolled use of poison, man has ________．

    [　　]

    A．

    made the drinking water dirty

    B．

    polluted the land

    C．

    got good harvest

    D．

    protected the animal life

    (3)

    We may conclude from the passage that now man ________．

    [　　]

    A．

    begins to understand the danger of pollution

    B．

    still doesn't realize how serious pollution is

    C．

    takes some measures to control pollution

    D．

    doesn't pay any attention to pollution

    (4)

    From the sentence “More people, more waste”, we know that ________．

    [　　]

    A．

    because of the increase of population and development of industry, more and more waste is produced．

    B．

    wanted more people, not more waste

    C．

    today there are more people than before, and there is more waste, too

    D．

    more people have been warned of the danger of more waste

    (5)

    All the following statements are true except “________” according to the passage．

    [　　]

    A．

    we live on the earth, so we should pay more attention to it

    B．

    to pollute means to make air, water and soil unfit for use

    C．

    all the waste produced by modern industry can be absorbed and made harmless

    D．

    man is now fighting a battle against different kinds of pollution

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    Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere.
    There is water in seas, rivers and lakes. Water is found almost everywhere. Even in the desert part of the world, there is some water in the air. You can not see or feel it when it is a part of the air. The water in the seas, rivers and lakes is a liquid, the water in the air is a gas, and we call it water vapour (蒸气).
    Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals(结晶体). Snow crystals are very very small crystals of ice. Ice is frozen water. It is a solid. There can be snow and ice everywhere in winter.
    Water may be a solid or a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is a liquid, you can drink it. When it is a gas, you can not see or feel it.
    【小题1】Where can we find water?

    A．We can find water when it turns into vapour.
    B．Water is only in seas and rivers.
    C．We can see water in deserts here and there.
    D．Water can be found almost everywhere.
    【小题2】 We can drink water when it is       
    A．a solidB．aliquid
    C．in the airD．turned into ice
    【小题3】Clouds are made of           
    A．seas, rivers and lakes
    B．blocks of ice
    C．very small drops of water or snow crystals
    D．solid, liquid and gas
    【小题4】Water has three states(状态). They are              
    A．solid, liquid and gas
    B．solid, vapour, snow
    C．drops of water, blocks of ice and crystals of water
    D．ice, snow and air

    查看答案和解析>>

    Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere.
    There is water in seas, rivers and lakes. Water is found almost everywhere. Even in the desert part of the world, there is some water in the air. You can not see or feel it when it is a part of the air. The water in the seas, rivers and lakes is a liquid, the water in the air is a gas, and we call it water vapour (蒸气).
    Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals(结晶体). Snow crystals are very very small crystals of ice. Ice is frozen water. It is a solid. There can be snow and ice everywhere in winter.
    Water may be a solid or a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is a liquid, you can drink it. When it is a gas, you can not see or feel it.
    【小题1】Where can we find water?

    A．We can find water when it turns into vapour.
    B．Water is only in seas and rivers.
    C．We can see water in deserts here and there.
    D．Water can be found almost everywhere.
    【小题2】We can drink water when it is
    A．a solidB．aliquidC．in the airD．turned into ice
    【小题3】Clouds are made of
    A．seas, rivers and lakes
    B．blocks of ice
    C．very small drops of water or snow crystals
    D．solid, liquid and gas
    【小题4】Water has three states(状态). They are
    A．solid, liquid and gas
    B．solid, vapour, snow
    C．drops of water, blocks of ice and crystals of water
    D．ice, snow and air

    查看答案和解析>>

    Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere.

    There is water in seas, rivers and lakes. Water is found almost everywhere. Even in the desert part of the world, there is some water in the air. You can not see or feel it when it is a part of the air. The water in the seas, rivers and lakes is a liquid, the water in the air is a gas, and we call it water vapour (蒸气).

    Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals(结晶体). Snow crystals are very very small crystals of ice. Ice is frozen water. It is a solid. There can be snow and ice everywhere in winter.

    Water may be a solid or a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is a liquid, you can drink it. When it is a gas, you can not see or feel it.

    1.Where can we find water?

    A．Water can be found almost everywhere

    B．We can find water when it turns into vapour.

    C．Water is only in seas and rivers.

    D．We can see water in deserts here and there.

    2.We can drink water when it is     .

    A．a solid            B．in the air          C．aliquid            D．turned into ice

    3.Clouds are made of     .

    A．seas, rivers and lakes                    B．solid, liquid and gas

    C．very small drops of water or snow crystals     D．blocks of ice

    4.Water has three states(状态). They are        .

    A．solid, liquid and gas

    B．solid, vapour, snow

    C．drops of water, blocks of ice and crystals of water

    D．ice,snow and air

     

    查看答案和解析>>

    Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere.

    There is water in seas, rivers and lakes. Water is found almost everywhere. Even in the desert part of the world, there is some water in the air. You can not see or feel it when it is a part of the air. The water in the seas, rivers and lakes is a liquid, the water in the air is a gas, and we call it water vapour (蒸气).

    Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals(结晶体). Snow crystals are very very small crystals of ice. Ice is frozen water. It is a solid. There can be snow and ice everywhere in winter.

    Water may be a solid or a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is a liquid, you can drink it. When it is a gas, you can not see or feel it.

    1.Where can we find water?

    A．We can find water when it turns into vapour.

    B．Water is only in seas and rivers.

    C．We can see water in deserts here and there.

    D．Water can be found almost everywhere.

    2. We can drink water when it is       

    A．a solid                                B．aliquid

    C．in the air                              D．turned into ice

    3.Clouds are made of           

    A．seas, rivers and lakes

    B．blocks of ice

    C．very small drops of water or snow crystals

    D．solid, liquid and gas

    4.Water has three states(状态). They are              

    A．solid, liquid and gas

    B．solid, vapour, snow

    C．drops of water, blocks of ice and crystals of water

    D．ice, snow and air

     

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