2024年1月4日发(作者：vivox23实体店多少钱)

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Unless it's raining or the wind is blowing,

we don't usually pay much attention to the

atmosphere, the blanket of air that

surrounds the Earth. Yet, without the

atmosphere, the Earth would be a desolate

(荒芜的) planet with no signs of life!

The atmosphere plays several roles in

helping to make life possible. First, the

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atmosphere provides the three gases

necessary for life: oxygen, nitrogen, and

carbon dioxide. All animals, including

ourselves, breathe oxygen. Nitrogen and

carbon dioxide are both needed for plant

growth. Less important atmospheric gases

include argon, neon, helium, and

hydrogen.

Second, the atmosphere also protects us

from most of the sun's high-energy

ultraviolet light rays, which are harmful to

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life. Although these rays are only a small

part of the sunlight striking the Earth, they

are known to be very dangerous. However,

99 percent of all ultraviolet rays are

absorbed before they reach the Earth's

surface. They are absorbed by an

atmospheric gas, called ozone, a type of

oxygen gas. The ozone layer surrounds

the Earth but is much thinner over the

North and South Poles than over other

regions of the Earth.

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The one percent of the ultraviolet light

in the atmosphere that does reach the

Earth's surface is known to cause sunburn

and is now believed to also cause skin

cancer in many people. Because of this,

doctors recommend that people limit the

amount of time they spend in direct

sunlight and wear a suntan lotion ( 防晒油) that blocks the ultraviolet rays when

they do sunbathe.

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Finally, the atmosphere generates all

types of weather such as clear blue skies

and storms. It acts as a huge energy

machine, changing sunlight into other

forms of energy such as heat and wind. As

part of this role, the atmosphere regulates

the temperature on the Earth's surface. First

it allows only 46 percent of the sunlight

striking it to pass through and actually

reach the Earth's surface. Second, carbon

dioxide gas in the atmosphere controls the

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amount of warmth on the Earth's surface

that is allowed to radiate ( 发散 ) back

into space. By these two controlling

devices, the atmosphere regulates the

Earth's surface the best answers to the

following questions.

1.

Which of the following is true

according to

the passage?

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A.

The ozone layer is much thicker over

North America than over the North

Pole.

B.

Ozone is a type of a nitrogen gas.

Ozone can absorb some ultraviolet

rays before they reach the Earth's

surface.

C.

D.

Ozone can protect us from anything

harmful to our life.

2.

The main idea of the third paragraph

is

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that __ .

A.

the Earth is surrounded by a layer of

ozone

B.

99 percent of all ultraviolet light rays

that reach the Earth's surface are

absorbed by the ozone layer

C.

the ozone layer protects people from the

sun's high-energy ultraviolet light rays

D.

ozone is an atmospheric gas

which surrounds the Earth

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3.

According to the article, carbon

dioxide ________________________

A.

is a less important atmospheric gas

controls the amount of warmth on

the Earth's surface

B.

C.

allows only 46 percent of sunlight

to reach the Earth's surface

D.

acts like a huge energy machine

Doctors suggest that ______ .

4.

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A.

people should stay away from the

sunlight to protect themselves from

the sunburn

B.

people should block the ultraviolet

rays when they do sunbathe

C.

people should wear a suntan lotion

under direct sunlight

D.

people should know that skin

cancer results from sunbathing

5. The Earth would be a desolate planet

without the atmosphere because __

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A.

the atmosphere is mainly composed

of oxygen, hydrogen and nitrogen,

which are indispensable to our life

B.

the atmosphere plays several roles

in making life possible

C.

the atmosphere allows only

harmless rays to reach the Earth

D.

the atmosphere controls the

amount of warmth on the Earth's

surface

Complete the following sentences with

the information given in the passage.

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1. The ozone layer over other regions of

the Earth is____ than that over the

North and South Pole.

KEY:

much thicker

2. It is____that changes sunlight into

other forms of energy.

KEY: the atmosphere

3.

Although_____are mostly absorbed

by the ozorie layer, doctors suggest that

people should limit the amount of time

spent in direct sunlight.

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KEY: high-energy ultraviolet

light rays

Compared with argon, neon and

hydrogen,are more important in

helping to make life possible.

KEY: oxygen, nitrogen, and carbon

dioxide

5. The purpose of wearing a suntan lotion

is to

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KEY:

protect people from

sunburn and skin cancer

翻译：地球的大气层

除非下雨或风在吹，我们通常不会注重气氛，周围的空气，地球毯子。然而，如果没有大气层，地球将是一个荒凉（荒芜的）与没有生命迹象的星球！

这里的气氛起着帮助，使生活成为可能多个角色。首先，提供了三种气体的大气生命所必需：氧，氮和二氧化碳。所有动物，包括我们自己，呼吸氧气。氮和二氧化碳都是植物生长所需。减重要的大气气体包括氩，氖，氦和氢。

其次，气氛也免受太阳的高能紫外线照射，这是我们一生中最有害的。虽然这些射线仅是地球的太阳光的显着一小部分，他们被称为是非常危险的。但是，所有99百分之的吸收紫外线，才到达地球表面。它们是由大气中吸收气体，称为臭氧的氧气气体种类。臭氧层环绕地球，但远在南极和北极薄于地球表面上的其他地区。

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对大气中的紫外线百分之一的不到达地球表面的已知会导致晒伤，现在相信很多人也会造成皮肤癌。正因为如此，医生建议人们限制了他们的时间花费在阳光直射和穿防晒油（防晒油），阻止了紫外线当他们这样做日光浴。

最后，大气产生如湛蓝的天空，所有的风暴天气类型。它作为一个巨大的能源机器，改变成其他能源形式，如热，风能阳光。作为该角色的一部分，大气调节地球表面的温度。首先，它仅允许46个惊人它通过和实际到达地球表面的太阳光百分之。其次，二氧化碳在大气中的二氧化碳气体控制着地球表面的温暖允许量的辐射（发散）回太空。这两个控制装置，大气调节地球表面的温度。

选择最好的回答下列问题。

1。下列哪个是真实根据

这篇文章？

答：臭氧层远远超过北美厚度超过了北极。

二臭氧是一种类型的氮气。

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三臭氧能吸收紫外线，才一些到达地球表面。

四臭氧能够保护任何有损于我们的生活我们。

2。第三个段落的主要思想是

的。

答：地球周围是一对臭氧层

二99所有的紫外线光线到达地球表面的百分之是臭氧层所吸收

C中的臭氧层可保护来自太阳的高能紫外线照射的人

四臭氧是一种气体，大气环绕地球

3。根据这篇文章，二氧化碳

答：是一个不太重要的大气气体

二控制的温暖对地球表面的数量

C.能只有百分之46的阳光到达地球表面

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四就像一个巨大的能源机器

4。医生建议。

答：人们应该远离阳光客场自己免受晒伤

乙人应该阻止紫外线当他们这样做日光浴

三人应戴直射阳光下防晒霜

四日光浴的人应该知道结果是皮肤癌

5。地球将是一个荒凉的星球，因为没有大气层

答：主要是由大气中的氧，氢和氮，这是我们生活不可缺少的

B的气氛使生活中可能扮演多种角色

C的气氛只允许无害射线到达地球

D.在温暖的气氛中就控制了地球表面的数量

完成与在文章中给出的信息下面的句子。

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1。比，超过有效期为地球其他地区的臭氧层在

南北极。

关键：更厚

2。它is____that变成其他形式的能源的阳光。

主要包括：大气

3。 Although_____are大多由ozorie层吸收，医生建议，人们应限制在阳光直射下花费的时间。

关键：高能紫外线照射

氩，氖和氢比较，更重要的帮助，使生活成为可能。

关键：氧，氮和二氧化碳

5。对佩戴一个防晒霜的目的是

关键：防止晒伤和皮肤癌的人

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