Retired jet engines could help clear the smog that smothered big cities.
To land at Indira Gandhi Airport is to descend from clear skies to brown ones. New Delhi's air is poisonous. According to the World Health Organization, India's capital has the most polluted atmosphere of all the world's big cities. The government is trying to introduce rules that will curb emissions-allowing private cars to be driven only on alternate days, for example, and enforcing better emissions standards for all vehicles.
But implementing these ideas, even if that can be done successfully, will change things only slowly. A quick fix would help. And Moshe Alamaro, a researcher at the Massachusetts Institute of Technology, thinks he has one. His idea is to take a jet engine, put it next to one of India's dirty coal-fired power plants, point its exhaust nozzle at the sky and then switch it on. His hope is that the jet's exhaust will disrupt a meteorological phenomenon known as "inversion", in which a layer of warm air settles over cooler air, trapping it, and that the rising stream of exhaust will carry off the tiny particles of matter that smog is composed of. Inversion exacerbates air pollution in Delhi and in many other cities, from Los Angeles to Tehran. A particularly intense example caused the Great Smog of London in 1952, when four days of air pollution contributed to 12,000 deaths.
Dr Alamaro thinks a jet engine could punch through the inversion layer to create a "virtual chimney" which would carry the trapped pollution above it, so that it could be dispersed in the wider atmosphere. He calculates that all the emissions from a gigawatt coal-fired power plant could be lifted away using a single engine with a nozzle speed of 460 metres a second.
However, he has not calculated whether a jet engine could disrupt the inversion layer and allow the pollution to escape the city-so he is now going to test that hypothesis. Within eight months, Dr Alamaro plans to put one of his updrafters next to a coal-fired power plant and monitor what happens using a fleet of drones. He is in discussions with Tata Group, a conglomerate with an electricity-generating arm, to run it next to one of the firm's power stations.
1.The second paragraph serves as _______.
A.a hook to raise reader’s interest in the topic
B.an introduction of the seriousness of pollution in India
C.an example of slow progress of smog control in India
D.a background to make the idea sound worthwhile
2.The idea of applying retired jet engines is most probably inspired by the fact that ______ .
A.New Delhi is suffering the most serious smog worldwide
B.a retired jet engine has a nozzle speed of 460 metres a second
C.the inversion layer prevent the pollutants from getting away
D.conventional ways to deal with air pollution are too slow
3.Which might be the best title of the passage?
A.New Delhi, the capital of Smog
B.Air Pollution, a Global Challenge
C.Air Pollution in Delhi
D.Air Pollution: Blown Away
Situated in the heart of Beijing, the Forbidden City－now called the Palace Museum－covers an area of 1,120,000 square meters. During nearly six hundred years, the palace served as the residence and court of twenty-four emperors. It consists of various structures built in accordance with the traditional Chinese architectural hierarchy（层次、结构）and designed to reflect imperial power and authority.
Entering from the south, visitors will see a succession of halls and palaces spreading out on either side of the central axis. The magnificent architectural complex and the vast holdings of paintings, calligraphy, ceramics, and antiquities of the imperial collections make it one of the most prestigious museums in China and the world. In 1987 it was listed as a UNESCO World Heritage site.
The Palace Museum can be approached through the Gate of Heavenly Peace. Immediately to the north of the Palace Museum is Prospect Hill, while on the east and west are the Wangfujing and Zhongnanhai neighborhoods. Visitors will be excited to find various historic sites, scenic parks, shopping malls, museums, and theatres in the vicinity of the Forbidden City. Conveniently located bus stops and subway stations provide easy access to transportation.
*Free admission for children under 1.2 meters in height.
*Concessions (减价票) for elementary, middle school, and undergraduate students on production of valid student I.D. or certified letter from the school administrator (excluding graduate and adult or continuing education students): 20 yuan.
*50% discount on concessions for seniors 60 years old and older with valid certificate or proof of age (passport, etc.)
*Women’s Day: Half-price admission for female visitors.
*Children’s Day: Free admission for children 14 years old and younger; 50% discount on admission for one accompanying parent, legal guardian, or adult.
Regulations & Suggestions:
*The online booking system (http://gugong.228.com.cn) allows visitors to purchase tickets 10 days beforehand.
*Receipts will be available for pickup at a designated office in the quadrangle （四方形院）between the Gate of Correct Deportment and the Meridian Gate（午门） within thirty days from the date of intended visit (including date of visit).
* Photography is permitted for private, non-commercial use outdoors throughout the Forbidden City, except for sites or areas with “No Photography”signs. For special photography, please contact the Director's Office (Fax: (8610)8500-7415, gugong@dpm.org.cn).
1.According to the passage, which of the following is true?
A.Photos can be taken as long as kept for private and non-commercial purposes.
B.The Palace Museum ranks No. 1 globally due to its architecture and collections.
C.Convenient transportation and medical assistance are accessible if necessary.
D.A man visiting the Palace Museum on National Day can get the receipt before December 1.
2.If a man takes his father who is retired and his 10 year-old son to the Palace Museum on
June 1, how much will they pay at least?
A.40 yuan . B.60 yuan.
C.90 yuan. D.110 yuan.
Since finishing my studies at Harvard and Oxford, I’ve watched one friend after another land high-ranking, high-paying Wall Street jobs. As executives (高级管理人员) with banks, consulting firms, established law firms, and major corporations, many are now ____ on their way to impressive careers. By society’s ____, they seem to have it made.
On the surface, these people seem to be very lucky in life. As they left student life behind, many had a ____ drink at their cheap but friendly local bar, shook hands with longtime roommates, and ____ out of small apartments into high buildings. They made reservations at restaurants where the cost of a bottle of wine ____ a college year’s monthly rent. They replaced their beloved old cars with expensive new sports cars.
The thing is, a number of them have ____ that despite their success, they aren’t happy. Some ____ of unfriendly coworkers and feel sad for eight-hour workweeks devoted to tasks they ____. Some do not respect the companies they work for and talk of feeling tired and ____. However, instead of devoting themselves to their work, they find themselves working to support the ____ to which they have so quickly become ____.
People often speak of trying a more satisfying path, and ____ in the end the idea of leaving their jobs to work for something they ____ or finding a position that would give them more time with their families almost always leads them to the same conclusion: it’s ____. They have loans, bills, a mortgage (抵押贷款) to ____, retirement to save for. They recognize there’s something ____ in their lives, but it’s ____ to step off the track.
In a society that tends to ____ everything in terms of dollars and cents, we learn from a young age to consider the costs of our ____ in financial terms. But what about the personal and social costs ____ in pursuing money over meaning? These are exactly the kinds of costs many of us tend to ignore — and the very ones we need to consider most.
1.A.much B.never C.seldom D.well
2.A.policies B.standards C.experiments D.regulations
3.A.last B.least C.second D.best
4.A.cycled B.moved C.slid D.looked
5.A.shared B.paid C.equaled D.collected
6.A.advertised B.witnessed C.admitted D.demanded
7.A.complain B.dream C.hear D.approve
8.A.distribute B.hate C.applaud D.neglect
9.A.calm B.guilty C.warm D.empty
10.A.family B.government C.lifestyle D.project
11.A.accustomed B.appointed C.unique D.available
12.A.yet B.also C.instead D.rather
13.A.let out B.turn in C.give up D.believe in
14.A.fundamental B.practical C.impossible D.unforgettable
15.A.take off B.drop off C.put off D.pay off
16.A.missing B.inspiring C.sinking D.shining
17.A.harmful B.hard C.useful D.normal
18.A.measure B.suffer C.digest D.deliver
19.A.disasters B.motivations C.campaigns D.decisions
20.A.assessed B.involved C.covered D.reduced
–– Can you believe Kim’s got fired from work?
–– . She was always late or calling in sick. But I hope she will find a new job.
A.God bless her B.It can’t hurt C.It serves her right D.No worries
There are so many spelling mistakes in the composition, and I have to write the letter out again. It means I will _________.
A.start from scratch B.kill the fatted calf
C.cost an arm and a leg D.give the cold shoulder
According to the bank rules released recently, you have to pay a 25% ________ on each cheque you cash.
A.admission B.pension
C.allowance D.commission
