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London has always been known for its "black fogs". In the winter of 1952, a milky white fog rolled into the city. As the smoke poured into the air, it was so hard to see that people had to walk in front of the buses to guide them. In this way, the most serious air pollution disaster in history began. When it was over, more than 4,000 people had been killed by the thick black smog.
New York City has had several London-type smogs since 1950. Each time, 100 to 400 deaths were caused by the smog. Although these smogs were not as deadly as London's, New York City has the worst air pollution problem in the United States.
In all the killer smogs, factories and homes poured smoke and fumes into the air from the furnaces. The chemical fumes combined with the water droplets in the fog to form harmful substances. These substances caused the illness of those who breathed the polluted air.
Usually, such harmful fumes rise into the upper air and are blown away by the wind. But sometimes there is an unusual weather condition called a temperature inversion. A layer of cold air remains near the ground as smoke and fumes pour into it. This is covered by an upper layer of warm air that acts like a lid. It prevents the polluted cooler air from rising. The harmful fumes pile up and make people ill. The smog may be so thick that airports are closed and chains of collisions occur on the highways.
Another type of smog occurs in Los Angeles. Here the weather may be clear and sunny. But stinging eyes and dry coughs show that harmful chemicals fill the air. The smog is due to invisible gases, mostly from automobile exhaust. Because these chemicals are changed by the sun high up in the air, it is called photochemical smog. It contains automobile exhaust fumes and nitrogen oxides changed by the sun's rays. Added to these are sulfur dioxide and other fumes from factories and oil refineries. Photochemical smog is found in many large cities all over the world.
Killer smogs don't happen very often, fortunately. But in Beijing, a combination of automobile exhaust fumes, home furnace smoke, and factory waste gases pours into the air. This may also happen in the suburbs, or out in the country, where large factories have been built. A number of harmful substances have been found in the air there. When these substances are breathed in day after day, the health of the population is affected.
Why do people call this phenomenon "black fog"?

A.It is black and dirty.
B.It can affect the health.
C.It can kill people.
D.It is too thick for people to see something.

What can reduce the air pollution according to the passage'?

A.Water. B.Wind. C.The sun. D.Cold air.

When photochemical smog happens in the city,          .

A.many people will be killed
B.black smoke may pour into the air
C.the weather may be fine
D.people have to walk to work

From the passage we know that the most serious black smog disaster took place in    .

A.London B.New York C.Los Angeles D.Beijing
科目 英语   题型 阅读理解   难度 中等
知识点: 日常生活类阅读
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相关试题

In ancient Egypt, the pharaoh(法老)treated the poor message runner like a prince when he arrived at the palace, if he brought good news. However, if the exhausted runner had the misfortune to bring the pharaoh unhappy news, his head was cut off.
  Shades of that spirit spread over today’s conversations. Once a friend and I packed up some peanut butter and sandwiches for an outing. As we walked light-heartedly out the door, picnic basket in hand, a smiling neighbor looked up at the sky and said, ”Oh boy, bad day for a picnic. The weatherman says it’s going to rain.”I wanted to strike him on the face with the peanut butter and sandwiches. Not for his stupid weather report, for his smile.
  Several months ago I was racing to catch a him As I breathlessly put my handful of cash across the Grey hound counter, the sales agent said with a broad smile ,”Oh that bus left five minutes ago.”Dreams of head-cutting!
  It’s not the news that makes someone angry. It’s the unsympathetic attitude with which it’s the unsympathetic attitude with which it’s delivered. Everyone must give bad news from time to time, and winning professionals do it with the proper attitude. A doctor advising a patient that she needs an operation does it in a caring way. A boss informing an employee he didn’t get the job takes on a sympathetic tone. Big winners know, when delivering any bad news, they should share the feeling of the receiver.
  Unfortunately, many people are not aware of this. When you’re tired from a long flight, has a hotel clerk cheerfully said that your room isn’t ready yet? When you had your heart set on the toast beef, has your waiter mainly told you that he just served the last piece? It makes you as traveler or diner want to land your fist right on their unsympathetic faces.
  Had my neighbor told me of the upcoming rainstorm with sympathy, I would have appreciated his warming .Had the Greyhound salesclerk sympathetically informed me that my bus had already left, I probably would have said, ” Oh, that’s all right I’ll catch the next one.” Big winners, when they bear bad news ,deliver bombs with the emotion the bombarded(被轰炸的)person is sure to have.
In Paragraph 1,the writer tells the story of the pharaoh to ____.

A.make a comparison B.describe a scene
C.introduce a topic D.offer an argument

From “Dreams of head-cutting!”(Paragraph3),we learn that the writer___.

A.was mad at the sales agent
B.was reminded of the cruel pharaoh
C.wished that the sales agent would have had dreams
D.dreamed of cutting the sales agent’s head that night.

What is the main idea of the text?

A.Learning ancient traditions can be useful.
B.Receiving bad news requires great courage.
C.Helping others sincerely is the key to business success.
D.Delivering bad news properly is important in communication.

Most mornings, the line begins to form at dawn: scores of silent women with babies on their backs, buckets balanced on their heads, and in each hand a bright-blue plastic jug. On good days, they will wait less than an hour before a water tanker goes across the dirt path that serves as a road in Kesum Purbahari, a slum on the southern edge of New Delhi. On bad days, when there is no electricity for the pumps, the tankers don’t come at all. “That water kills people,” a young mother named Shoba said one recent Saturday morning, pointing to a row of pails filled with thick, caramel (焦糖)-colored liquid. “Whoever drinks it will die.” The water was from a pipe shared by thousands of people in the poor neibourhood. Women often use it to wash clothes and bathe their children, but nobody is desperate enough to drink it.
  There is no standard for how much water a person needs each day, but experts usually put the minimum at fifty litres. The government of India promises (but rarely provides) forty. Most people drink two or three litres—less than it takes to wash a toilet. The rest is typically used for cooking and bathing. Americans consume between four hundred and six hundred litres of water each day, more than any other people on earth. Most Europeans use less than half that. The women of Kesum Purbahari each hoped to drag away a hundred litres that day—two or three buckets’ worth. Shoba has a husband and five children, and that much water doesn’t go far in a family of seven, particularly when the temperature reaches a hundred and ten degrees before noon. She often makes up the difference with bottled water, which costs more than water delivered any other way. Sometimes she just buys milk; it’s cheaper. Like the poorest people everywhere, the people of New Delhi’s slums spend a far greater percentage of their incomes on water than anyone lucky enough to live in a house connected to a system of pipes.
The underlined word “slum” most likely means ______.

A.a village
B.a small town
C.the part of a town that lacks water badly
D.an area of a town with badly-built, over-crowded buildings

Sometimes the water tanker doesn’t come because ______.

A.there is no electricity B.the weather is bad
C.there is no water D.people don’t want the dirty water

A person needs at least ________ litres of water a day.

A.forty B.four hundred C.a hundred D.fifty

The passage mainly tells us ______.

A.how India government manages to solve the problem of water gets their water
B.how women in Kesum Purbahari
C.how much water a day a person deeds
D.that India lacks water badly

Next time a customer comes to your office, offer him a cup of coffee. And when you’re doing your holiday shopping online, make sure you’re holding a large glass of iced tea. The physical sensation(感觉)of warmth encourages emotional warmth, while a cold drink in hand prevents you from making unwise decisions—those are the practical lesson being drawn from recent research by psychologist John A. Bargh.
Psychologists have known that one person’s perception(感知)of another’s “warmth” is a powerful determiner in social relationships. Judging someone to be either “warm” or “cold” is a primary consideration, even trumping evidence that a “cold” person may be more capable. Much of this is rooted in very early childhood experiences, Bargh argues, when babies’ conceptual sense of the world around them is shaped by physical sensations, particularly warmth and coldness. Classic studies by Harry Harlow, published in 1958, showed monkeys preferred to stay close to a cloth “mother” rather than one made of wire, even when the wire “mother” carried a food bottle. Harlow’s work and later studies have led psychologists to stress the need for warm physical contact from caregivers to help young children grow into healthy adults with normal social skills.
Feelings of “warmth” and “coldness” in social judgments appear to be universal. Although no worldwide study has been done, Bargh says that describing people as “warm” or “cold” is common to many cultures, and studies have found those perceptions influence judgment in dozens of countries.
To test the relationship between physical and psychological warmth, Bargh conducted an experiment which involved 41 college students. A research assistant who was unaware of the study’s hypotheses(假设), handed the students either a hot cup of coffee, or a cold drink, to hold while the researcher filled out a short information form. The drink was then handed back. After that, the students were asked to rate the personality of “Person A” based on a particular description. Those who had briefly held the warm drink regarded Person A as warmer than those who had held the iced drink.
“We are grounded in our physical experiences even when we think abstractly,” says Bargh.
The author mentions Harlow’s experiment to show that ________.

A.babies need warm physical contact
B.caregivers should be healthy adults
C.adults should develop social skills
D.monkeys have social relationships

In Bargh’s experiment, the students were asked to ________.

A.write down their hypotheses
B.evaluate someone’s personality
C.fill out a personal information form
D.hold coffee and cold drink alternatively

We can infer from the passage that ________.

A.abstract thinking does not come from physical experiences
B.feelings of warmth and coldness are studied worldwide
C.physical temperature affects how we see others
D.capable persons are often cold to others

What would be the best title for the passage?

A.Drinking for Better Social Relationships.
B.Developing Better Drinking Habits.
C.Experiments of Personality Evaluation.
D.Physical Sensations and Emotions.

People diet to look more attractive.Fish diet to avoid being beaten up,thrown out of their social group,and getting eaten as a result.That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists.
  The research team have discovered that subordinate(低一等的) fish voluntarily diet to avoid challenging their larger competitors."In studying gobies we noticed that only the largest two individuals,a male and female,had breeding(繁殖)rights within the group," explains Marian Wong."All other group members are nonbreeding females,each being 5-10% smaller than its next largest competitor.We wanted to find out how they maintain this precise size separation."
  The reason for the size difference was easy to see.Once a subordinate fish grows to within 5-10% of the size of its larger competitor,it causes a fight which usually ends in the smaller goby being driven away from the group.More often than not,the evicted fish is then eaten up.
  It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish.Whether they did so voluntarily,by restraining how much they ate,was not clear.The research team decided to do an experiment.They tried to fatten up some of the subordinate gobies to see what happened.To their surprise,the gobies simply refused the extra food they were offered,clearly preferring to remain small and avoid fights,over having a feast.
  The discovery challenges the traditional scientific view of how boss individuals keep their position in a group.Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves,so keeping their competitors small.
  While the habits of gobies may seem a little mysterious,Dr.Wong explains that understanding the relationships between boss and subordinate animals is important to understand how hierarchical(等级的)societies remain stable.
  The research has proved the fact that voluntary dieting is a habit far from exclusive to humans."As yet,we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature," the researchers comment."Data on human dieting suggests that,while humans generally diet to improve health or increase attractiveness,rarely does it improve long-term health and males regularly prefer females that are fatter than the females' own ideal."
When a goby grows to within 5-10% of the size of its larger competitor,it _________.

A.leaves the group itself B.has breeding rights
C.eats its competitor D.faces danger

The underlined words "the evicted fish" in Paragraph 3 refer to _________.

A.the fish beaten up B.the fish driven away
C.the fish found out D.the fish fattened up

The experiment showed that the smaller fish _________.

A.fought over a feast B.preferred some extra food
C.challenged the boss fish D.went on diet willingly

What is the text mainly about?

A.Fish dieting and human dieting. B.Dieting and health.
C.Human dieting. D.Fish dieting.

A MENTORING (导师制) program is giving life changing opportunities to Banbury youth.
Young Inspirations was founded two years ago to provide mentoring sessions for students and unemployed young adults aged 11 to 21.
Alex Goldberg, the program's founder, said; "We set up Young Inspirations because we wanted to give young people experiences which will potentially be life changing and broaden their outlook.
"We try to create work experience opportunities that will really make a difference to our youth. For example, we've secured internships (实习) with world-famous firms such as Honda.
"At a time of funding cutbacks where schools are finding it more and more difficult to offer this kind of mentoring, it is extremely important that these opportunities are available both to help youth with their school work and grades and to give them opportunities which may help shape their futures. " Kieran Hepburn, 14, is one of a group of Banbury youth who has benefited from the program so far. In October the Banbury School pupil was accompanied by Young Inspirations staff to Paris where he was an observer at the United Nations Educational, Scientific and Cultural Organization's (UNESCO) International Youth Forum (论坛).
The event was held for young people from around the world, to seek their views on how the future of youth and education should look. Kieran joined several hundred observers mostly in their 20s and was the only UK school pupil to attend the event. Kieran thinks the trip was a life changing experience. " Before we left I didn't quite know what to make of it but when we got there we didn't stop, it was amazing," he said, " We went to three or four hours of debates each day and then did something cultural each afternoon."
The main theme of the forum was how youth can drive change in political and public life. It dealt with issues such as drug abuse, violence and unemployment.
Kieran said: " It has really helped me to improve my confidence and social skills as well as my school grades and I was voted most improved pupil at school in August. "
The Young Inspirations mentoring sessions take place each Friday in Banbury. For details visit www.younginspirations.com.
66.The Young Inspirations mentoring program aims to _____.

A.train staff for world-famous firms
B.provide youth with unique experiences
C.offer job opportunities to young adults
D.equip the unemployed with different skills

67.According to Alex Goldberg, it is difficult for schools to offer the mentoring due to ______.

A.the shortage of money B.the cultural differences
C.the effect of unemployment D.the lack of support from firms

68.According to the passage, the forum focused on how youth can ______.

A.build up their confidence at school
B.find work experience opportunities
C.improve their social skills for the future
D.play an active role in the change of society

69.We can learn from the passage that _____.

A.the visit to the United Kingdom was amazing
B.the youth have found a way to solve their problems
C.Kieran has made great progress in many aspects
D.the mentoring sessions are held every day except Friday

70.What would be the best title for the passage?

A.Alex Goldberg, Founder of Young Inspirations
B.Kieran, Banbury School Pupil to Paris
C.Young People Find a World of Opportunity
D.Debates Help Youth with Their Grades

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