首页 > 外语类考试> 专四专八

网友您好，请在下方输入框内输入要搜索的题目：

请输入或粘贴题目内容搜题

搜题

拍照、语音搜题，请扫码下载APP

题目内容（请给出正确答案）

[主观题]

Pollution occurs whenever unnatural substances are introduced into an environment. Most

ocean pollution caused by humans are concentrated along the 【M1】______ coasts of continents. Lets see what some of the pollutants are. Industrial wastes sometimes get to seawater. Often, 【M2】______ these contain(concentrations)of metals and chemicals that harm organisms. Solid wastes, such as plastic bags and fishing line left lying on the beaches, can entangle in animals. Medical waste such as needles, plastic 【M3】______ tubing, and bags are a threat to both humans and animals. Pesticides, which include herbicides(weed killers) and insecticides(insect killers), used in farming reaching the ocean as runoff. They become 【M4】______ concentrating in the tissues of marine organisms. 【M5】______ Crop fertilizers and human sewage create a different kind of problem. They fertilize the water. This causes some types of algae to produce very rapidly. 【M6】______ When these algae die, theyre decomposed by huge amount of bacteria. The problem is that the bacteria use 【M7】______ up much of the oxygen in the water during respiration. However, other organisms such as fish cant get the 【M8】______ oxygen they need, and they die. Oil spills also pollute the ocean. Youve heard in the news about major oil spills caused to tanker 【M9】______ collisions, and leaks at offshore oil wells. Another source of oil pollution is oil mixed with wastewater thats pumped out of ships. In addition to these resources, oil discarded from cars and industries is 【M10】______ sometimes dumped into streams. It, too, eventually reaches the ocean.

【M1】

答案

查看答案

发布时间：2019-08-17

更多“Pollution occurs whenever unnatural substances are introduced into an environment. Most”相关的问题

第1题

Light pollution occurs when______A．artificial lights illuminate the night sky.B．the moon l

Light pollution occurs when______

A．artificial lights illuminate the night sky.

B．the moon lights up the night sky.

C．too many stars are visible in the night sky.

D．streetlights are turned off.

点击查看答案

第2题

32 Light pollution occurs whenA artificial lights illuminate the night sky.B the moon ligh

32 Light pollution occurs when

A artificial lights illuminate the night sky.

B the moon lights up the night sky.

C too many stars are visible in the night sky

D streetlights are turned off.

点击查看答案

第3题

As more and more large factories are built in China, it can be infered that ______ .A．Chin

As more and more large factories are built in China, it can be infered that ______ .

A．China will face the big challenge of pollution

B．no pollution problem occurs in China

C．there will be more traffic accidents in China

D．the weather will become bad in China

点击查看答案

第4题

Light Night, Dark StarsThousands of people around the globe step outside to gaze at their

Light Night, Dark Stars

Thousands of people around the globe step outside to gaze at their night sky. On a clear night, with no clouds, moonlight, or artificial lights to block the view, people can see more than 14,000 stars in the sky, says Dennis Ward, an astronomer(天文学家) with the University Corporation for Atmospheric Research (UCAR) in Boulder, Colo. But when people are surrounded by city lights, he says, they're lucky to see 150 stars.

If you've ever driven toward a big city at night and seen its glow from a great distance, you've witnessed light pollution. It occurs when light from streetlights, office buildings, signs, and other sources streams into space and illuminates(照亮) the night sky. This haze(薄雾) of light makes many stars invisible to people on Earth. Even at night, big cities like New York glow from light pollution, making stargazing difficult.

Dust and particles of pollution from factories and industries worsen the effects of light pollution. "If one city has a lot more light pollution than another", Ward says, "that city will suffer the effects of light pollution on a much greater scale".

Hazy skies also make it far more difficult for astronomers to do their jobs.

Cities are getting larger. Suburbs are growing in once dark, rural areas. Light from all this new development is increasingly obscuring(使变模糊) the faint(微弱的) light given off by distant stars. And if scientists can't locate these objects, they can't learn more about them.

Light pollution doesn't only affect star visibility. It can harm wildlife too. It's clear that artificial light can attract animals, making them go off course. There's increasing evidence, for example, that migrating(迁徙) birds use sunsets and sunrises to help find their way, says Sydney Gauthreaux Jr., a scientist at Clemson University in South Carolina. "When light occurs at night", he says, "it has a very disruptive(破坏性的) influence". Sometimes birds fly into lighted towers, high-rises, and cables from radio and television towers. Experts estimate that millions of birds die this way every year.

On a clear night, people can see______

A．150 stars.

B．hundreds of stars.

C．one thousand stars.

D．more than 14,000 stars.

点击查看答案

第5题

Light Night, Dark Stars Thousands of people aroundthe globe step outside to gaze at their

Light Night, Dark Stars

Thousands of people aroundthe globe step outside to gaze at their night sky. On a clear night, with no clouds, moonlight, or artificiallights to block the view, people can see more than 14,000 stars in the sky, says Dennis Ward, anastronomer with the University Corporation for Atmospheric Research (UCAR) in Boulder, Colo.But when people are surrounded by city lights, he says, they're lucky to see 150 stars.

If you've ever driventoward a big city at night and seen its glow from a great distance, you've witnessed light pollution. It occurs whenlight from streetlights, office buildings, signs, and other

sources streams into space and illuminates the night sky. This haze oflight makes many stars invisible to people on Earth. Even at night, big citieslike New Yorkglow from light pollution, making stargaz-ing difficult.

Dust and particles ofpollution from factories and industries worsen the effects of lightpollution."If one city has a lot more light pollution than another,"Ward says, "that city will suffer the effectsof light pollution on a muchgreater scale. "

Hazy skies also make it farmore difficult for astronomers to do their jobs.

Cities are getting larger.Suburbs are growing in once dark, rural areas. Light from all this newdevelopment is increasingly obscuring the faint light given off by distantstars. And if scientists can't locate these objects, they can't learn moreabout them.

Light pollution doesn't onlyaffect star visibility. It can harm wildlife too. It's clear that artificiallight can attract animals,'making them go off course. There's increasingevidence, for example, that migrating birds use sunsets and sunrises to helpfind their way, says Sydney Gauthreaux Jr. , a scien- tist at Clemson Universityin South Carolina."When light occurs at night, " he says, "it has a very dis- ruptive influence." Sometimes birds fly into lighted towers, high-rises, and cables fromradio and tele- vision towers. Experts estimate that millions of birds die thisway every year.

41.When can people see 14,000 stars？

A.When they have a fairly good telescope

B.When they are in a large city

C.When the n:ght sky is clear of clouds, moonlight and artificial lights

D.When the night sky is without haze and fog

点击查看答案

第6题

下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。第一篇Light Night, Da

下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。

第一篇

Light Night, Dark Stars

Thousands of people around the globe step outside to gaze at their night sky. On a clear night, with no clouds, moonlight, or artificial lights to block the view, people can see more than 14,000 stars in the sky, says Dennis Ward, an astronomer (天文学家) with the University Corporation for Atmospheric Research (UCAR) in Boulder, Colo. But when people are surrounded by city lights, he says, they're lucky to see 150 stars.

If you've ever driven toward a big city at night and seen its glow from a great distance, you've witnessed light pollution. It occurs when light from streetlights, office (照亮) the night buildings, signs, and other sources streams into space and illuminates ~ sky. This haze (朦胧) of light makes many stars invisible to people on Earth. Even at night, big cities like New York glow from light pollution, making stargazing difficult.

Dust and particles of pollution from factories and industries worsen the effects of light pollution. "If one city has a lot more light pollution than another," Ward says, "that city will suffer the effects of light pollution on a much greater scale."

Hazy skies also make it far more difficult for astronomers to do their jobs.

Cities are getting larger. Suburbs are growing in once dark, rural areas. Light from all this new development is increasingly obscuring (使变模糊) the faint (微弱的) light given off by distant stars. And if scientists can't locate these objects, they can't learn more about them.

Light pollution doesn't only affect star visibility. It can harm wildlife too. It's clear that artificial light can attract animals, making them go off course. There's increasing evidence, for example, that migrating (迁徙) birds use sunsets and sunrises to help find their way, says Sydney Gauthreaux Jr., a scientist at Clemson University in South Carolina. "When light occurs at night," he says, "it has a very disruptive (破坏性的) influence." Sometimes birds fly into lighted towers, high-rises, and cables from radio and television towers. Experts estimate that millions of birds die this way every year.

31 On a clear night, people can see

A 150 stars.

B hundreds of stars.

C one thousand stars.

D more than 14,000 stars.

点击查看答案

第7题

根据以下材料，回答题Air PollutionThere is no question that the old style. of air pollution

根据以下材料，回答题

Air Pollution

There is no question that the old style. of air pollution could kill people. In one week following the infamous "peasouper" fog in December 1952，4，700 people died in London. Most of these people were elderly and already had heart or lung diseases. A series of these killer fogs eventually led to the British Parliament passing the Clean Air Act which restricted the burning of coal.

Fortunately， the effect of smog on the lungs is not so dramatic. Scientists have now conducted a number of laboratory experiments in which volunteers are exposed to ozone inside a steel chamber for a few hours. Even at quite low concentrations there is a rewrsible fall in lung function，an increase in the irritability of the lungs and evidence of airway inflammation. Although irritable and inflamed lungs are particularly seen in people with asthma（哮喘）and other lung diseases， theseeffects of ozone also occur in healthy subjects. Similar changes are also seen after exposure to nitrogen dioxide， although there is some disagreement about the concentration at which they occur.

Other studies have found that people living in areas with high levels of pollution have more symptoms and worse lung function than those living in areas with clean air. Groups of children attending school camps show falls in lung function even at quite low concentrations of ozone.

There is also a relationship between ozone levels and hospital admissions for asthma， both in North America and Australia. It is suspected that long-term exposure to smog may result in chronic bronchitis （支气管炎） and emphysema （肺气肿）， but this has yet to be proven.

Recently an association has been found between the levels of particles in the air and death rates in North American cities. The reason for this association is not understood and as yet there is no evidence this occurs in Australia. However， we do know that hazy days are associated with more asthma attacks in children.

Which of the following is NOT the result of laboratory experience？查看材料

A.Low concentrations.

B.Fall in lung function.

C.Irritability of the lungs.

D.Airway inflammation.

点击查看答案

第8题

Questions下列各 are based onthe following passage. A useful definition of an air polluta

ntis a compound added directly or indirectly by humans to the atmospherein suchquantities as to affect humans, animals, vegetation, or material adversely (有害地．. Air pollution requires avery flexibledefinition that permits continuous change. When the first air pollution lawswere established inEngland in the fourteenth century, air pollutants werelimited to compounds that could be seen or smelled—a farcry (悬殊的差别． from the extensive list of harmful substances known today. Astechnology has developed andknowledge of the health aspects of variouschemicals has increased, the list of air pollutants has lengthened. Inthefuture, even water vapor (水蒸气． might be consideredan air pollutant under certain conditions. Many of the more important airpollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides,arefound in nature. As the Earth developed, the concentrations (浓度． of these pollutants were altered byvariouschemical reactions; they became components in biogeochemical (生物地球化学的． cycles. These serve as an airpurification scheme by allowing thecompounds to move from the air to the water or soil. On a global basis,naturesoutput of these compounds dwarfs that resulting from human activities. However,human productionusually occurs in a localized area, such as a city. In this localized region, human outputmay be dominant and may temporarily overload the natural purificationscheme ofthe cycles. The result is an increased concentration of noxious (有害的． chemicals in the air. Theconcentrations atwhich the adverse effects appear will be greater than the concentrations thatthe pollutants wouldhave in the absence of human activities. The actualconcentration need not be large for a substance to be apollutant; in fact thenumerical value tells us little until we know how much of an increase thisrepresents over the concentration that would occur naturally in the area. Forexample, sulfur dioxide has detectable health effects at0.08 parts per million(ppm．, which is about 400 times its natural level.Carbon monoxide, however, has a naturallevel of 0.1 ppm and is not usually apollutant until its level reaches about 15 ppm. It can be inferred from thefirst paragraph that _________

A.water vapor is an air pollutant in localized areas

B.the definition of air pollution will continue to change

C.a substance becomes an air pollutant only in cities

D.most air pollutants today can be seen or smelled

点击查看答案

第9题

阅读：A useful definition of an air pollutantis a compound added directly or indirectly by humans to the atmospherein suchquantities

Questions61-65 are based onthe following passage.

A useful definition of an air pollutantis a compound added directly or indirectly by humans to the atmospherein suchquantities as to affect humans, animals, vegetation, or material adversely (有害地). Air pollution requires avery flexibledefinition that permits continuous change. When the first air pollution lawswere established inEngland in the fourteenth century, air pollutants werelimited to compounds that could be seen or smelled—a farcry (悬殊的差别) from the extensive list of harmful substances known today. Astechnology has developed andknowledge of the health aspects of variouschemicals has increased, the list of air pollutants has lengthened. Inthefuture, even water vapor (水蒸气) might be consideredan air pollutant under certain conditions.

Many of the more important airpollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides,arefound in nature. As the Earth developed, the concentrations (浓度). of these pollutants were altered byvariouschemical reactions; they became components in biogeochemical (生物地球化学的) cycles. These serve as an airpurification scheme by allowing thecompounds to move from the air to the water or soil. On a global basis,nature'soutput of these compounds dwarfs that resulting from human activities. However,human productionusually occurs in a localized area, such as a city.

In this localized region, human outputmay be dominant and may temporarily overload the natural purificationscheme ofthe cycles. The result is an increased concentration of noxious (有害的). chemicals in the air. Theconcentrations atwhich the adverse effects appear will be greater than the concentrations thatthe pollutants wouldhave in the absence of human activities. The actualconcentration need not be large for a substance to be apollutant; in fact thenumerical value tells us little until we know how much of an increase thisrepresents over the concentration that would occur naturally in the area. Forexample, sulfur dioxide has detectable health effects at0.08 parts per million(ppm), which is about 400 times its natural level.Carbon monoxide, however, has a naturallevel of 0.1 ppm and is not usually apollutant until its level reaches about 15 ppm.

61、It can be inferred from thefirst paragraph that _________

A.water vapor is an air pollutant in localized areas

B.the definition of air pollution will continue to change

C.a substance becomes an air pollutant only in cities

D.most air pollutants today can be seen or smelled

62、In what way can naturalpollutants play an important role in controlling air pollution？

A.They function as part of a purification process.

B.They are dwarfed by the pollutants produced by human activities.

C.They are less harmful to living beings than are other pollutants.

D.They have existed since the Earth developed.

63、According to the passage,the numerical value Of the concentration level of a substance is only useful if

A.the other substances in the area are known

B.it is a localized area

C.it can be calculated quickly

D.the naturally occurring level is also known

64、Which of the following isbest supported by the passage？

A.To effectively control pollution, local government should regularlyrevise the air pollution laws.

B.One of the most important steps in preserving natural lands is tobetter enforce air pollution laws.

C.Scientists should be consulted in order to establish uniform. limitsfor all air pollutants.

D.Human activities have great impact on air pollution.

65、The passage mainlydiscusses _________

A.the economic impact on air pollution

B.how much damage air pollutants can cause

C.what constitutes an air pollutant

D.the quantity of compounds added to the atmosphere

点击查看答案

第10题

The forwarder can monitor the movement of goods on behalf of the consignee whe the consignee control

s the freight.

点击查看答案

账号：尚未登录

登录没有账号？去注册

购买搜题卡

考试指南全部 >

期货从业资格证能干啥基金从业资格证领取流程基金从业资格证如何获取银行从业资格证书有用吗期货从业资格考试徐州考点基金从业资格证在哪里打印证券从业资格和基金从业资格哪个难河北初级银行职业资格报名入口在哪证券从业资格证是啥 2024证券从业资格和期货从业资格哪个容易考

下载APP

关注公众号

TOP