英语四级阅读模拟训练附答案和精讲 第59篇-地层
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英语四级阅读模拟训练附答案和精讲 第59篇:地层
The Earth comprises three principal layers: the dense,
iron-rich core, the mantle made of silicate (硅酸盐) that are
semi-molten at depth, and the thin, solid-surface crust There
are two kinds of crust, a lower and denser oceanic crust and
an upper，lighter continental crust found over only about 40
percent of the Earth's surface. The rocks of the crust are of
very different ages. Some continental rocks are over 3,000
million years old, while those of the ocean floor are less than
200 million years old. The crusts and the top, solid part of
the mantle, totaling about 70 to 100 kilometers in thickness,
at present appear to consist of about 15 rigid plates, 7 of which
are very large. These plates move over the semi-molten lower
mantleto produce all of the major topographical(地形学的)features of the Earth. Active zones where intense
deformation occur are confined to the narrow, interconnecting
boundaries of contact of the plates.
There are three main types of zones of contact: spreading
contacts where plates move apart, converging contacts where
plates move towards each other, and transform contacts where
第 2 页 共 4 页 plates slide past each other. Newoceanic crust is formed along
one or more margins of each plate by material issuing from
deeper layers of the Earth' s crust, for example, by volcanic
eruptions (爆发) of lava (火山熔岩) at mid-ocean ridges. If at
such a spreading contact the two plates support continents，a rift(裂缝) is formed that will gradually widen and become
flooded by the tea. The Atlantic Ocean formed like this as the
American and Afro-European plates moved in opposite directions.
When two plates carrying continents collide, the continental
blocks,too light to be drawn down, continue to float and
therefore buckle (起褶皱) to form a mountain chain along the
length of the margin of the plates.
练习题：
Choose correct answers to the question:
1.The Earth’s crust______.
A.can be classified into two types
B.is formed along the margins of the plates
C.consists of semi-molten rocks
D.is about 70 to 100 kilometers thick
2.The 15 plates of the Earth are formed from ___.
A.the oceanic crusts and continental crusts
B.the crusts and the mantle
第 3 页 共 4 页 C.the crusts and the top and solid part of the mantle
D.the continental crusts and the solid part of the mantle
3.Seriously-deformed zones appear _______
A.whenever the crusts move over mantle
B.when the plates move towards each other
C.in the narrow boundaries where two plates meet
D.to be the major topographical feature of the Earth
4.According to the second paragraph, the formation of the
Atlantic Ocean is the example of_______.
A.spreading contacts
B.the influence of volcanic eruptions
C.converging contacts
D.transform contacts
5.This passage is probably_______.
A.a newspaper advertisement
B.a chapter of a novel
C.an excerpt from a textbook
D.a scientific report of new findings
1.[A] 事实细节题。选项A与文章第1段第2句所述一致，为正确答案。此类题可采用排除法。根据第2段第2句的内容可以知道选项B所指的只是地壳中的一种.而不是所有地壳。选項C与文章第1句的内容不符。选項D的主语应该是地壳和上层的地幔，不仅仅
第 4 页 共 4 页 是地壳。
2.[C] 推理判断题。此题可定位到第1段倒数第3句。题干中的15 plates是原文该句中的宾语，且该句的谓语中心词是consist
of(由......组成)，题干的谓语是are formed from，这意思一致，但题目用的是被动语态。表明答案可从原文该句的主语得到。主语中的top和solid并列修饰part of the mantle。选项C为该句的同义替换，故正确。
3.[C] 亊实细节题。选项C是对第1段最后一句的同义改写。文章中没有提到选项A中the crusts move over mantle 这种现象；选项B提到的现象在第2段第1句才讨论到，与题干无关；文中也没有提到严重变形的地区是地球的主要地形特征，因此选项D不正确。
4.[A] 亊实细节题。第2段主要分成两部分：第一部分谈板块活动的三种形式，第二部分分别举例说明其中在说明spreading
contacts时，引用了大西洋的例子："The Atlantic Ocean formed like
this..."，所以答案为A。
5. [C] 主旨大意题。由本文的语言风格和描述内容可以判定这篇文章既不是商业性的，也不是文学性的同时文中叙述的内容具有科普性质，不可能是太前沿性的，因此A、B、D三项都不正确，选项C为此题答案。
12月英语四级阅读理解模拟题及答案
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2017年12月英语四级阅读理解模拟题：【原文】
Antarctica has actually become a kind of space station a
unique observation post for detecting important changes in the
worlds environment. Remote from major sources of pollution and
the complex geological and ecological systems that prevail
elsewhere, Antarctica makes possible scientific measurements
that are often sharper and easier to interpret than those made
in other parts of the world.
Growing numbers of scientists therefore see Antarctica as a
distant-early-warning sensor, where
potentially dangerous
global
trends may be spotted before they show up to the north. One
promising field of investigation is glaciology.
Scholars from
the
United States, Switzerland, and France are pursuing seven
separate but related projects that reflect their concern for the health of the West Antarctic Ice Sheet a concern they believe
英语四级阅读模拟题及答案精修订
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2015年6月英语四级阅读模拟题03及答案
Section C
Directions: There are 2 passages in this section. Each
passage is followed by some questions or unfinished
statements. For each of them there are four choices marked
A ),B．, C． andD． . You should decide on the best choice
and mark the corresponding letter on Answer Sheet 2 with a
single line through the centre.
Passage One
Questions 56 to 60 are based on the following passage.
Educators today are more and more often heard to say that
computer literacy is absolutely necessary for college
students. Many even argue that each incoming freshman should
have permanent access to his or hcr own microcomputer. What
advantages do computers offer the college students
Any student who has used a word processor will know one
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I’m usually fairly skeptical about any research that
concludes that people are either happier or unhappier or
more or less certain of themselves than they were 50 years
ago. While any of these statements might be true, they are
practically impossible to prove scientifically. Still, I
was struck by a report which concluded that today’s
children are significantly more anxious than children in
the 1950s. In fact, the analysis showed, normal children
ages 9 to 17 exhibit a higher level of anxiety today than
children who were treated for mental illness 50 years ago.
Why are America’s kids so stressed? The report cites
two main causes: increasing physical isolation—brought on
by high divorce rates and less involvement in munity, among
大学英语四级阅读模拟题及详解
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在平时的学习、工作中，我们很多时候都会有考试，接触到试题，试题是命题者根据测试目标和测试事项编写出来的。你所了解的试题是什么样的.呢？以下是店铺为大家搜索整理的大学英语四级阅读模拟题及详解，希望能给大家带来帮助!
For questions 1-7, mark
Y(for YES) if the statement agrees with the information given
in the passage;
N (for NO) if the statement contradicts the information given
in the passage;
NG (for NOT GIVEN) if the information is not given in the
passage.
For questions 8-10, complete the sentences with the
information given in the passage.
Types of Climate
Climate is the combination of temperature, moisture, wind,
and sunshine at a place over a period of many years. Weather is
made up of atmospheric conditions during a few hours or days.
The weather may be rainy on a certain day. But that place may
usually have a warm, dry, sunny climate. We learn about the
climate of a place by studying its temperature, moisture, wind,
大学英语四级阅读训练附答案和精讲
大学英语四级阅读训练附答案和精讲
Americans are pound of their variety and individuality, yet they love and
respect few thingsmore than a uniform, whether it is the uniform of an
elevator operator or the uniform of afive-star general. Why are uniforms so
popular in the United States?
Among the arguments for uniforms, one of the first is that in the eyes of
most people they lookmore professional than civilian 百姓的 clothes. People
have become conditioned to expectsuperior quality from a man who wears a
uniform. The television repairman who wearsuniform tends to inspire more trust
than one who appears in civilian clothes. Faith in the skillof a garage
mechanic is increased by a uniform. What easier way is there for a nurse,
apoliceman, a barber, or a waiter to lose professional identity 身份 thanto
step out ofuniform?
英语四级考试阅读模拟预测练习题及答案
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Use a dictionary and grammar guide constantly.keep a small
english dictionary with you at all time.when you see a new
word,look it up.think about the word--use it.in your mind,in a
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On Thursday afternoon Mrs. Carke, dressed for going out,
took her handbag with her money and her key in it, pulled the
door behind her to lock it and went to the over 60s Club. She
always went there on Thursdays. It was a nice outing for an old
woman who lived alone.
At six o'clock she cane home, let herself in and at once smelt
cigarette smoke. Cigarette smoke in her house? How? How? Had
someone got in? She checked the back door and the windows.
All were locked or fastened, as usual. There was no sign of forced
entry.
Over a cup of tea she wondered whether someone might
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四级考试英语阅读模拟题(一)
Asked to name their favorite city, many Amerians would
select San Francisco which began as a small Spanish outpost
located on a magnificent bay.The town was little more than a
village serving ranchers when the United States took possession
of it in 1846 during the war with Mexico.
San Francisco sprang into a city overnight because of the
nearby discovery of gold in 1848. A great rush to California took
place. Wagon trains plodded their dangerous way across 2000
miles of prairie and mountains, while hundreds of sailing vessels
made the equally hazardous trip around the Horn. The vessels
disgorged thousands of passengers -- then the crews deserted
their ship and hundreds of vessels were left to rot in the bay.
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英语四级阅读模拟题及答案
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The world has become a world of cities. With the present rate of
urban growth(3. 8% in the Third World) , the majority of the
population of the world will be living in cities by the year 2000. This
will transform the rural-urban equation which has marked the
history of mankind up to now and will call for new example and a
great deal of innovation to face this phenomenon.
This being so, one must accept the fact that for some years to
come, no policy will be capable of stopping or reversing the present
migratory trend from the rural areas to the cities in the Third World.
In Africa, the urban population will reach 330 million people by the
end of the century as against 150 million in 1995.
The number of people living in shanty-towns (贫富窟) will
inevitably increase in spite of the efforts to improve housing
大学英语四级阅读模拟练习题附答案
大学英语四级阅读模拟练习题附答案
It came as something of a surprise when Diana, Princess of Wales,
made a trip to Angola in 1997, to support the Red Crosss campaign
for a total ban on all anti-personnel landmines. Within hours of
arriving in Angola, television screens around the World were filled
with images of her comforting victims injured in explosions caused
by landmines. I knew the statistics, she said. But putting a face
to those figures brought the reality home to me; like When I met
Sandra, a 13-year-old girl who had lost her leg, and people like
her.
The Princess concluded, with a simple message: We must stop
landmines. And she used every opportunity during her visit to repeat
this message.
But, back in London, her views were not shared by some members
of the British government, which refused to support a ban on these
英语四级阅读模拟训练附答案和精讲 第57篇-地理与人
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英语四级阅读模拟训练附答案和精讲 第57篇:地理与人
A subject which seems to have been insufficiently studied
by doctors and psychologists is the influence ofgeography and
climate on the psychological and physical health of
mankind．There seems no doubt that the general character of the
landscape, the relative length of day and night, and the climate
must all play a big part in determining what kind of people we
are.
It is true that a few studies have been made. Where all the
inhabitants of a particular area enjoy exceptionally good or
bad health, scientists have identified .contributory factors
such as the presence or absence of substances like iodine,
fluoride, calcium, or iron in the water supply, or perhaps types
of land thatprovide breeding places for pests like mosquitoes
or rats.
Moreover, we can all generalize about types of people we