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提问人：网友beinuo0501 发布时间：2022-01-07

[主观题]

Air is all around us. It is around us when we walk and play. From the moment we are born,

air surrounds us. When we sit down, it is around us. When we go to bed, air is also around us. No matter where we are on earth, air surrounds us. We live in air.All living things need air. Living things cannot live without air. We can go without food or water for a few days, but we cannot live for more than a few minutes without air. When we are working or running, we need more air. So we breathe faster than usual. When we are asleep, we need less air.

People can live without food or water for______.

A．a few months

B．a few weeks

C．a few days

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更多“Air is all around us. It is around us when we walk and play. From the moment we are born,”相关的问题

第1题

Without the atmosphere, there would be no weather, no wind, rain, snow, or clouds. Air is

all around us; we live at the bottom of a great ocean of air. It is invisible, but we can feel it when it moves. There are miles of all above us, pressing down with great weight on the earth and everything on it. Because air presses down on us from all directions at the same time, and because we are able to bear (忍受) this weight, we do not seem to feel it. But scientists have proved that air has this weight, and that anything that has weight creates (产生) a force called pressure. As changes in air pressure take place, they make air move.

Air is a gas that expands (膨胀) when heated, gets lighter, and moves upward. When air is

cooled, it gets heavier, sinks close to the earth's surface, and flows like water in a great river. As warm air rises, cold air rashes to take its place. Thus winds originate (起源). Tile winds that blow high above us are caused by the warmer air running away from colder air. The wind we feel near the earth's surface is the heavy colder air trying hard to catch the warmer air. Changes in temperature cause the air to move. And of course there are many changes, so air movements are taking place practically all the time.

The first paragraph mainly tells us______.

A．why we don't feel air

B．why atmosphere is important to us

C．why there is air surrounding us

D．why there is air pressure

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第2题

听力原文：In a way, all of us are on a spaceship, the planet Earth. We move around the sun

听力原文： In a way, all of us are on a spaceship, the planet Earth. We move around the sun at 18 miles per second and never stop. On our spaceship we have five billion people and a limited supply of air, water, and land. These supplies have to be used carefully because we can't buy new air, water, or land from anywhere else.

The environment on our planet is a closed system Nothing new is ever added. Nature recycles its resources. Water, for example, evaporates and rises as visible drops to form. clouds. This same water returns to the earth as rain or snow. The rain that falls today is actually the same water that fell on the land 70 million years ago.

Today, the Earth is in trouble. Factories pour dirty water into our rivers. Many fish die and the water become unhealthy for people to drink. Cars and factories put poisons into the air and cause plants, animals and people to get sick. People throw bottles and paper out of their car windows, and the roadside becomes covered with all sorts of wastes. Over the years, people have changed the environment, and we have pollution.

To continue to survive, we must learn how to use the Earth's resources wisely. We have to change our habits and stop dumping such enormous amounts of industrial waste into the water and air. We must cooperate with nature and learn better ways to use, not to abuse, our environment.

(33)

A．Because both have a limited supply of air, water, and other resources.

B．Because the Earth moves around the sun as fast as a spaceship.

C．Because we can travel to outer space.

D．Because the Earth never stops moving.

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第3题

听力原文：In a way, all of us are on a spaceship, the planet Earth. We move around the sun

听力原文： In a way, all of us are on a spaceship, the planet Earth. We move around the sun at 18 miles per second and never stop. On our spaceship we have six billion people and a limited supply of air, water, and land. These supplies have to be used carefully because we can't buy new air, water, or land from anywhere else.

The environment on our planet is a closed system: nothing new is ever added. Nature recycles its resources. Water, for example, evaporates and rises as visible drops to form. clouds. Then the water returns to earth as rain or snow. The rain that falls today is actually the same water that fell on the land 70 million years ago.

Today, the Earth is in trouble. Factories pour dirty water into rivers. Many fishes die and the water become unhealthy for people to drink, Cars and factories put poisonous gas into the air and cause plants, animals and people to get sick. People throw bottles and paper out of their car windows, and the roadside becomes covered with all sorts of wastes. Over the years, people have changed the environment, and at the same time we cause pollution.

(29)

A．Because both have a limited supply of air, water, and other resources.

B．Because the Earth moves around the sun as fast as a spaceship.

C．Because we can travel to outer space.

D．Because the Earth never stops moving.

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第4题

听力原文：In a way, all of us are on a spaceship, the planet Earth. We move around the sun

听力原文： In a way, all of us are on a spaceship, the planet Earth. We move around the sun at 18 miles per second and never stop. On our spaceship we have five billion people and limited supply of air, water, and land. These supplies have to be used careful because we can't buy new air, water, or land from anywhere else.

The environment on our planet is a closed system: nothing new is ever added. Nature recycles its resources. Water, for example, evaporates and rises as visible drops to form. clouds. This same water returns to the Earth as rain or snow. The rain that falls today is actually the same water that fell on the land 70 million years ago.

Today, the Earth is in trouble. Factories pour dirty water into our rivers. Many fish die and the water becomes unhealthy for people to drink. Cars and factories put poisons into the air and cause plants, animals and people to get sick. People throw bottles and paper out of their car windows, and the roadside becomes covered with al sorts of wastes. Over the years, people have changed the environment, and we have pollution.

(33)

A．Because both have a limited supply of air, water, and other resources.

B．Because the Earth moves around the sun as fast as a spaceship.

C．Because we can travel to outer space.

D．Because the Earth never stops moving.

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第5题

In a way, all of us are on a spaceship, the planet Earth. We move around the sun【36】18 mil

es per second and never stop. On our spaceship we have five billion people and a limited supply of air, water, and land. The【37】have to be used carefully because we can't buy new air, water, or land from【38】else.

The environment on our planet is a closed system: nothing new is ever added. Nature【39】its resources. Water, for example, evaporates and【40】as visible drops to form. clouds. This same water returns to the Earth as rain or snow. The rain that falls today is actually the same water fell on the【41】70 million years ago.

Today, the Earth is in trouble. Factories【42】dirty water into our rivers. Many fish die and the water becomes unhealthy for people to drink. Cars and factories put poisons【43】the air and cause plants, animals and people to get sick. People throw bottles and paper out of their car windows, and the roadside becomes covered with all sorts of wastes. Over the years, people have changed the environment, and we have pollution.

To continue to【44】we must learn how to use the Earth' s resources wisely. We have to change our【45】and stop dumping such enormous amounts of industrial waste into the water and air. We must cooperate with nature and learn better ways to use, not abuse, our environment.

(36)

A．at

B．with

C．in

D．on

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第6题

听力原文：Ladies and gentlemen, attention, please. Our bus will arrive at Lake District in

a few minutes. You can feel the comfortable cool air coming from the lake. This is a favorite place for tourists in summer, especially on a hot summer afternoon like today. This area is one of the British national parks. People began to build houses around the lake a hundred years ago, so in this park you can have a special view of houses of all shapes and styles and colors. In late autumn and winter, this park is the best place for an outing. People like to have a good walk around it. Now our bus is driving around the lake. You can sit back and enjoy the beauty of everything here. The bus will take us to a good spot, where you can take the most wonderful photos you have ever taken.

Here we are! Where we get off is where we get on. Return to the bus in Fifty minutes. Thank you!

Who do you think is speaking？

A．A bus driver.

B．A tourist guide.

C．A visitor.

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第7题

听力原文： Spaceships travel around the earth, go to the moon, and return home safely. T

he astronauts carry important supplies with them on the spaceship — food, water and air. Sometimes there are problems on the spaceship, and the astronauts have to understand how the spaceship works in order to repair the problems. In a way, all of us are really on a spaceship, the planet Earth. We move around the Sun at 18 miles per second and never stop. On our spaceship we have four billion people and a limited supply of air, water and land. These supplies, just like the limited supplies on the astronauts spaceship, have to be used carefully because we cant buy new air, water or land from anywhere else. Everyone needs air, water and land to live — this is our environment. The environment on our planet is a closed system; nothing new is ever added. Nature recycles its resources. Water, for example, evaporates and rises to form. clouds. This same water returns to the earth as rain or snow. The rain that falls today is actually the same water that fell on the dinosaurs 70 million years ago. Over the years, people have changed the environment. We have poured back into the land, air, and water more wastes than nature can clean. So we have pollution today. To continue to survive, we must learn how to use the Earths resources wisely, without destroying them. To save the spaceship Earth, we must cooperate with nature and learn better ways to use, not to abuse our environment. Questions 20 to 22 are based on the passage you have just heard. 20. Which would be the best title for the passage？ 21. Which is true according to the passage？ 22. What can we conclude from the passage？20．

A．The present population on earth is fourteen billion.

B．Water is recycled every seventy million years.

C．The planet earth travels around the sun at 18 miles per second.

D．The earth is compared to a spaceship because they both travel around the sun.

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第8题

There are millions of stars and planets in space.What's the difference between sta

rs and planets？ Stars can give out heat and light, but planets cannot.

The sun is one of the stars.Some planets are balls of rock and some are balls of gas.We live on the planet earth.The earth spins around once every day to give us day and night.The earth goes around the sun once every year to give us different seasons.

There are eight planets moving around the sun.We call the family of the sun and its planets the solar system.Mercury is the nearest to the sun, so it is very hot.It is the smallest planet.Venus is very bright and hot.It is the nearest to the earth.Mars is covered with orange-red desi and rocks, so it looks like a red star in the sky.It has seasons like the earth.Jupiter has more than 16 moons (卫星)and it is the biggest and heaviest planet.Saturn has more than 22 moons.The other planets, such as Uranus and Neptune, are all very far from the sun and very cold.We need a telescope (望远镜) to see them.

(1)The sun can give us().

A.heat and water

B.heat and light

C.light and air

D.rock and water

(2)The Chinese meaning of "spin around" is().

A.飞行

B.行驶

C.环绕

D.旋转

(3)The earth goes around()once every year to give us different seasons.

A.the moon

B.Mars

C.Jupiter

D.the sun

(4)Mars looks red in the sky because().

A.it is covered with orange- red dust and rocks

B.it has seasons like the earth

C.it is the nearest to the earth

D.it is covered with red water and dust

(5)Which is NOT true according to the passage？ ()

A.Jupiter is the biggest and heaviest planet.

B.Uranus is very far from the sun and very cold.

C.The revolution(公转) of the earth gives us different seasons.

D.We call the family of the sun and its planets the Milky Way.

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第9题

Daily changes in the weather affect all of us, no matter what our job or profession. Howev

er,【B1】there's very little we can do to modify the weather, we can at least know what kind of weather to expect. For this we are indebted(感激的) to our【B2】weather-watchers.

Although it may sound funny to call scientists weather-watchers, there's【B3】funny about what they do. Specifically, weather-watchers are meteorologists(气象学者)【B4】work for the United States Weather Bureau. They study the ocean of【B5】that surrounds the earth and, with the information they get, predict our weather.

The atmosphere【B6】in height from 300 to 700 miles above the earth and is divided into a series of layers or shells. The layer that is most interesting【B7】the meteorologist is the troposphere(对流层) or the layer closest to the earth.【B8】is in the troposphere that all our weather is formed.

【B9】causes our weather is really a very simple process. Endless streams of hot air push up from the earth. As they rise, they are【B10】by the freezing temperatures of the【B11】troposphere. Once it has become cold and heavy, the air【B12】back toward the earth, but it【B13】move down because of the rising hot air. In the meantime, planetary winds, which blow around the earth, or air currents keep both the cold air mass as well as the hot air mass in【B14】.

There are two additional factors that influence these moving air masses.【B15】is water vapor that the rising hot air soaks up like a sponge. The other is temperature Which, by cooling the hot air, forces it to【B16】out its water vapor in the form. of rain, snow, or sleet(雨夹雪).

These air masses【B17】push against each other with tremendous pressure. When a high-pressure mass of air succeeds【B18】pushing out a low-pressure air mass, we have clearing conditions and【B19】weather. When a low-pressure air mass forces out a high-pressure mass of air, stormy weather can be【B20】.

【B1】

A．when

B．as

C．while

D．if

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