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    ( )Ice is water in a state. A. gas B.liquid C. solid D. rain 【查看更多】

     

    题目列表(包括答案和解析)

    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 cool 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 driest part of the world, there is some water in the air. You cannot 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 vapor.

    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 cannot see or feel it.

    1.Where can we find water?

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

    B. Water can be found almost everywhere.

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

    D. Water is only in seas and rivers.

    2.We can drink water 　　　　 .

    A. when it is a liquid　　　　　　　　　　　　　　　　  B. when it is a solid

    C. when it is in the air　　　　　　　　　　　　　　    D. when it is turned into ice

    3.Clouds are made of 　　　　 .

    A. seas, rivers and lakes

    B. blocks of ice

    C. water in its solid state

    D. very small drops of water or snow crystals

    4.Water has three states. They are 　　　　 .

    A. ice, snow and air　　　　　　　　　　　　　　　　   B. solid, gas and vapor

    C. solid, liquid and gas　　　　　　　　　　    D. drops, blocks and crystals

    5.We must protect water resources because 　　　　 .

    A. crops need water　　　　　　　　　　　　　　　　  B. all living things need water

    C. all animals need water　　　　　　　　　　 D. all plants need water

     

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    阅读理解，阅读下列短文，从各题所给的A、B、C和D项中选出最佳选项。

    　　Lightning(闪电)is shocking, and it happens all over the world! Scientists think that there are more than three million lightning strikes(袭击)every day in the world-that's thirty strikes every second．

    　　Lightning can also be very dangerous．Every year, lightning kills people because it can start big fires or because it reaches temperatures up to 28, 000 degrees centigrade．American Roy Sullivan, who worked in a park, holds the record for surviving the most lightning strikes．Between 1942 and 1983, he was hit seven times!

    　　So, why does lightning strike? Lightning strikes happen when ice and water in clouds rub(摩擦)together, and cause atmospheric(大气层的)changes．When this happens, it creates a static charge(静电电荷)．Lightning can strike inside the cloud, between two clouds and between a cloud and Earth．It's the last type of strike that is the most dangerous for humans．About 1, 000 people get struck by lightning every year in the United States, and about 100 of them die as a result．

    　　Lightning is certainly not something to toy with．When lightning strikes, it's best to stay inside a large building．To stay safe, do not stand under trees, on hills or near water．Trees attract lightning．Also, do not lie down on the ground, otherwise the electricity may go through you and cause a heart disease．

    (1)

    Lightning strikes ________．

    [　　]

    A．

    happen three billion times each day

    B．

    will start when there are big fires

    C．

    can reach very high temperatures

    D．

    kill all those who work in a park

    (2)

    What does “surviving” in paragraph 2 mean in Chinese?

    [　　]

    A．

    目睹

    B．

    幸存

    C．

    制造

    D．

    遇难

    (3)

    We can infer(推断)from paragraph 3 that ________．

    [　　]

    A．

    lightning strikes are caused whenever ice and water meet

    B．

    lightning between two clouds is the most dangerous for humans

    C．

    lightning strikes create static charge

    D．

    about one tenth of the people struck by lightning die every year in America

    (4)

    Which expression means “to toy with” in the last paragraph?

    [　　]

    A．

    to play with

    B．

    to take seriously

    C．

    to show off

    D．

    to take it easy

    (5)

    Where's the best place to be when lightning strikes?

    [　　]

    A．

    On top of a hill．

    B．

    In a swimming pool．

    C．

    In a tree．

    D．

    Inside．

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    阅读理解

    　　①Many places in the world need more fresh water. Every country is trying to find ways to turn salt water into fresh.

    　　Why aren't there many factories like the Symi factory?

    　　In some places, the sun isn't hot enough, or it doesn't shine every day. In these places, other ways of heating sea water can be used. These ways cost more money, but they work faster than the sun. By boiling sea water with high heat. A lot of fresh water can be made quickly.

    　　But heating is not the only way to get fresh water from salt water. Other ways are tried.One way is freezing. The fresh part of salt water freezes first. To get fresh water, the pieces of ice are taken out.

    　　Which way is the best? The one that gives the most water for the least money. It may be a different way for each place.

    　　Symi's way seems very good for small, hot places. It doesn't make very much water at a time. But the factory is easy to build and cost little.

    　　②That is why people in many dry places talk about symi!

    (1)

    把短文中①句改为被动语态：_____________

    (2)

    把短文②句译成汉语：_________________

    (3)

    From the passage we know that fresh water_________________.

    　　A.is needed in many countries　　B.is needed in every country

    　　C.can be used in many ways　　D.is very important for factories

    [　　]

    (4)

    The writer is mainly talking about water making factories in different countries.(判断正误)

    (5)

    What is the meaning of“freezing?”

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    阅读理解

    　　A desert is a very dry land where there is hardly any rain．In the day, it can be so hot that you could fry an egg on the ground．But during the night it is sometimes so could that water would turn into ice．

    　　Many desserts are covered in sand．But some have mountains, rocks, or lakes that have dried up in the heat．The Great American Dessert has cliffs(悬崖)that have been made into amazing and beautiful shapes by the wind．The Sahara Desert in Africa is mostly sand．The Australian Desert has red sand．

    　　Sometimes it does not rain for a whole year in the desert．But there is water deep under the ground and some plants have roots that go very deep to find it．Other plants have roots that spread out(延伸)a long way so they can suck up the rain as soon as it falls．

    　　One desert plant is the cactus, which has long, spreading roots．The cactus stores water inside its hard skin．This skin protects it from heat and cold．

    　　Camels are a bit like cactus plants! They store water too－inside their bodies．They have special fur which protects them from the sun during the day and keeps them warm at night．

    　　Some other animals live in deserts, too．They have to be very good at seeing and hearing because most of them only come out at night．This is why many desert animals have extra big eyes or ears．

    　　A desert fox has bigger ears than a normal for．A gerbil has huge eye, so that it can see at night．It stays cool in the day by staying underground, like most desert animals．

    　　Some people live in the desert but they always make their homes near an oasis．An oasis is where water comes from an underground river．Near an oasis, people can grow lots of plants and keep animals．

    　　Life is hard in the desert, for people, animals and plants．But desert people like to live there．

    (1)

    A desert is very dry because __________．

    [　　]

    A．

    it is sandy

    B．

    there is so little rain

    C．

    the wind is strong

    D．

    there is no water deep under the ground

    (2)

    What does the underlined phrase"suck up"in paragraph 3 mean __________?

    [　　]

    A．

    围堵

    B．

    讨好

    C．

    释放

    D．

    吸收

    (3)

    Some desert animals have extra big eyes or ears because __________．

    [　　]

    A．

    the sunlight is too strong in the day

    B．

    they need to see and hear well at night

    C．

    it is very cold at nigh

    D．

    they store water in them．

    (4)

    Most desert animals stay cool in the day by __________．

    [　　]

    A．

    storing water in side their bodies

    B．

    drinking water as much as they can

    C．

    staying underground

    D．

    growing lots of plants

    (5)

    Which of the following is true?

    [　　]

    A．

    Desert people like to live in the desert though life is hard．

    B．

    People in the desert usually fry eggs on the ground．

    C．

    Camels have special fur to store water．

    D．

    All the deserts are covered in sand．

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    　　阅读短文，选择正确答案.

    　　Many places in the world need more fresh (淡的) water. Every country is trying to find ways to turn salt water into fresh.

    　　Why aren't there many factories like the Symi factory?

    　　In some places, the sun isn't hot enough, or it doesn't shine every day. In these places, other ways of heating (加热) sea water can be used. These ways cost more money, but they work faster than the sun. By boiling (煮沸) sea water with high heat, a lot of fresh water can be made quickly.

    　　But heating is not the only way to get fresh water from salt water. Other ways are tried. One way is freezing (冷冻). The fresh part of salt water freezes first. To get fresh water, the pieces of ice are taken out. Which way is best? The one that gives the most water for the least money. It may be a different way for each place. Symi's way seems very good for small, hot places. It doesn't make very much water at a time. But the factory is easy to build and cost little.

    　　That's why people in many dry places talk about Symi!

    　　(1)From the passage we know that fresh water ________.

    [　　]

    　　A. is needed in many countries

    　　B. is needed in every country

    　　C. is very important for factories

    　　D. is very important for many  many factories

    　　(2)The Symi factory ________.

    [　　]

    　　A. is a fresh-water factory

    　　B. can be built everywhere

    　　C. can make much fresh water at a time

    　　D. doesn't need sunshine every day

    　　(3)Which is the best way for small and hot places to get fresh water?

    [　　]

    　　A. Boiling or heating the sea water.

    　　B. The way in sunny places.

    　　C. The Symi's way.

    　　D. Freezing the sea water in cold places.

    　　(4)The writer is mainly talking about ________.

    [　　]

    　　A. water-making factories in different countries

    　　B. the ways of making fresh water from sea water

    　　C. hot places and dry places

    　　D. how to make good use of the sunlight

    　　(5)Which is wrong?

    [　　]

    　　A. New ways are tried to get fresh water.

    　　B. Heating can make a lot of fresh water quickly.

    　　C. The best way is to get the most fresh water with the least (最少) money

    　　D. The Symi's way doesn't work in dry places.

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