London, Reuters--What could annoy teenagers e...

London, Reuters--What could annoy teenagers enough to make them stop hanging out with friends and go home？

No, it's not a visit from their mothers, and not a threat to take away their cellphones or pocket money.

It's high-frequency noise. The UK police recently agreed to use a device (装置) called the Sonic Teenager Deterrent. It sends out a sound that makes teenagers become so impatient and angry that they have to cover their ears tightly and walk away.

The sound is at extreme high-pitch that can be heard by those under 20. The body's natural ability to detect some wave bands decreases almost entirely after 20, so few adults can hear the sounds. The black-box device, nicknamed the Mosquito because of its sound, can be fixed to the outside walls of shops, offices and homes. It sounds to youngsters like a crazy insect or a badly played violin. But it causes no physical damage.

A number of police forces and councils have given permission to use the system and want to install (安装) it at trouble spots.

Staffordshire Police Inspector Amanda Davies, who has given the device to shopkeepers in the Moorlands area, said," It is controlled by the shopkeepers--if they can see through their window that there is a problem, they turn the device on for a while until the group has run away."

1.The device can be used to _______.

A．threaten teenagers in public

B．drive away trouble-makers under 20

C．help mothers control their teenage children

D．help the police control shopkeepers

2.From the passage we can know that _______.

A．young people often suffer from pains in ears

B．shopkeepers are troubled by noisy insects

C．high-frequency noise is beyond the listening ability of people over 20

D．the police invented a new device to deal with teenagers

3.The purpose of the writer to write the passage is ______.

A．to advertise a new hi-tech device

B．to tell the reader a piece of news

C．to sell the device to shopkeepers

D．to inform the public as the spokesman of the police

4.Who will welcome the device most?

A．Shopkeepers.      B．The police.         C．Young people.      D．The producer.

高二英语阅读理解中等难度题查看答案及解析

Air travel can be annoying. But research now suggests global warming could make it much worse. To get off the ground in really hot weather, planes may be forced to carry fewer passengers. That might mean a little more space, which would be good. However, it also would make the passengers pay more.

Average air temperatures around the world are rising because people are polluting the air with increasing amounts of greenhouse gases, which, such as carbon dioxide, are a byproduct of burning fuels. Those warmer temperatures can influence an airplane’s ability to fly because air molecules (分子) spread out more as the air warms. This produces less lift under a plane’s wings, so a plane must be lighter to take off in hot weather than on cooler days.

It can even prove too dangerous for some planes to attempt a take-off. A record of June heat wave in the American Southwest, for instance, caused flight cancellations in Phoenix, Ariz. One airline ‘s planes were cleared to operate only up to 47.8℃. On June 20, Phoenix reached 48.3℃!

Radley Horton is a climate scientist at Columbia University. Two years ago, he and his graduate student Ethan David Coffel studied the effect of warming at four US airports and found that warming of track could triple (使成三倍) the number of days when planes face weight restrictions. Later, they explored the effect of rising temperatures on five types of commercial planes flying out of 19 of the world’s busiest airports. In the coming decades, as many as one to three out of every 10 flights that take off during the hottest time of day could face weight restrictions, they found. In some cases, a typical 160-seat plane would have to remove 4％of its weight. That would be equal to taking a dozen people off the plane, the researchers calculated.

1.How would global warming affect air travel according to the first paragraph?

A.It’ll add to the danger of flying.

B.It’ll increase passengers’ travel cost.

C.It’ll make flying much more comfortable.

D.It’ll encourage more people to travel by plane.

2.What is the second paragraph actually intended to explain?

A.How global warming is happening. B.What decides a plane’s ability to fly.

C.Why global warming affects flying. D.Where greenhouse gases are created.

3.What is the last paragraph mainly about?

A.Reasons for flight cancellation. B.Financial condition related to hot air.

C.The tendency of temperature change. D.Findings of effects of warming on flying.

4.What should be the best title for the text?

A.Air Travel isn’t Recommended during Hot Weather

B.Rising Temperatures May Reduce the Number of Flights

C.Weight Restrictions Are More Common in More Airports

D.Hotter Air May Lead to Planes Carrying Fewer Passengers

高二英语阅读理解中等难度题查看答案及解析

Although a teenager, Fred could resist ______ what to do and what not to do.

高二英语单项填空简单题查看答案及解析

Although a teenager, Fred could not resist ______ what to do and what not to do.

A．telling                                B．to tell

C．being told                             D．to be told

高二英语单项填空中等难度题查看答案及解析

Although a teenager, Yuanyuan could resist ________ what to do and what not to do.

A. to be told              B. having been told

C. being told              D. to have been told

高二英语单项填空困难题查看答案及解析

Although he was a teenager, Robert could resist _______ what to do and what not to do.

A. being told　　　 B. to tell

C. to be told　　　 D. telling

高二英语单项填空中等难度题查看答案及解析

LONDON (Reuters) — Children are dying for lack of drugs tailored to their needs, according to the World Health Organization (WHO), which launched a global campaign on Thursday to promote more research into child medicine.

More than half of the drugs currently used to treat children in the industrialized world have not been specifically tested on youngsters.

The problem is even worse in developing countries where price remains a major barrier and 6 million children die each year from treatable conditions.

In the case of HIV/AIDS, the few existing pediatric therapies（儿科的疗法）developed for children generally cost three times more than adult ones.

As a result, clinicians lack clear guidelines on the best drug to use and often have to guess at the correct dose.

Fortunately, the WHO has drawn up the first international List of Essential Medicines for Children, containing 206 products considered safe for children.

“But a lot remains to be done. There are priority medicines that have not been adapted for children’s use or are not available when needed,” said Dr Hans, the U.N. agency’s director of medicines policy and standards.

Medicines that need to be adapted to children’s needs include many antibiotics, pain drugs as well as combination pills for HIV/AIDS, tuberculosis and malaria.

The agency is building an Internet entrance linking to clinical trials carried out in children and will launch a Web site with the information early next year.

Testing medicines on children has always been a controversial issue, since good ethical（伦理的）practice requires informed agreement from people participating in clinical trials, which is difficult to obtain in the case of children.

As a result, research-based drug companies have been wary of developing child-friendly medicines and general companies have been slow to produce them at lower cost.

In an attempt to deal with the issue, both Europe and the United States now have special rules offering extended patent protection for drugs that have been tested on children.

1.Which of the following is the best title of the passage?

A. A Global Campaign to Promote Research into AIDS Medicine

B. WHO Says Children are Dying for Lack of Child-sized Drugs

C. Many People are Concerned about Children’s Drugs

D. Measures Taken to Develop Child-friendly Medicine Quickly

2.Which of the following medicine is not needed to be adapted to children’s need according to the passage?

A. Pain killers.                     B. Tuberculosis.                   C. AID pills.              D. Flu pills.

3.Why has testing medicines on children always been a controversial issue?

A. It is against good ethical practice

B. Children shouldn’t take part in clinical trials.

C. It is hard to get informed agreement from children tested.

D. Parents don’t allow their children to be tested on medicine.

4.The underlined word “wary” in the last but one paragraph means _________.

A. fast                          B. fond              C. cautious            D. uninterested

5.What can be inferred from the passage?

A. There is still a long way to go on children’s medicine.

B. An Internet entrance is being built to link to clinical trials carried out in children.

C. Both Europe and the United States now have special rules offering extended patent protection for adults’ drugs.

D. Less than half of the drugs currently used to treat children in the industrialized world have not been specifically tested on youngsters

高二英语阅读理解中等难度题查看答案及解析

LONDON ( Reuters)-- Ecotourism (生态旅游) is causing a lot of damage to wildlife and may be endangering the survival(生存) of the very animals people are flocking to see, according to researchers.

Biologists and conservationists (自然环境保护论者) are worried because polar bears, dolphins, penguins and other creatures are getting stressed and losing weight and some are dying.

“Evidence is growing that many animals do not react well to tourists in their backyard,” New Scientist magazine said.

The immediate effects researchers have noticed are changes in behavior, heart rates, or stress hormone levels but they fear it could get much worse and over the long term “could endanger the survival of the very wildlife they want to see”.

Although money produced through ecotourism, which has been growing at about 10--30 percent a year, has major benefits for poor countries and people living in rural areas, the Swiss-based World Conservation Union (IUCN) and some governments fear not all projects are audited (审计) and based on environmentally friendly policies, according to the magazine.

“The transmission(传播) of disease to wildlife, or small changes to wildlife health through disturbance of daily life or increased stress levels, while not obvious to the casual observer, may translate to lower survival and breeding,” said Philip Seddon, of the University of Otago in Dunedin, New Zealand.

Scientists have noticed that bottleneck dolphins along the northeastern coast of New Zealand become nervously excited when tourist boats arrive. Similar changes in behavior have been observed in polar bears and yellow-eyed penguins in areas visited by ecotourists are producing smaller babies.

Conservationists are now calling for more research into the effect of ecotourism on animals and say the industry must be developed carefully. They also want studies done before new ecotourism projects are started.

“The animals’ welfare should be very important because without them there will be no ecotourism,” said Rochelle Constantine of the University of Auckland in New Zealand.

1.What's the text mainly about?

A. Many animals are dying because of lack of money.

B. There will be no ecotourism without animals.

C. Ecotourism could endanger the survival of the wildlife people want to see.

D. More research should be done on ecotourism.

2.According to New Scientist magazine, more and more evidence has come to suggest that _____.

A. polar bears are getting stressed

B. other creatures are losing weight

C. many animals do not respond well to travellers in their backyard

D. All of the above

3.Which of the following is NOT mentioned in the text?

A. Ecotourism may endanger the survival of some animals.

B. Polar bears in areas visited by ecotourists are producing smaller babies.

C. Ecotourism has been growing at about 10--30 percent a year.

D. Studies should be done before new ecotourism projects are started.

高二英语阅读理解中等难度题查看答案及解析

He promised to do what he ______ sure of _______.

高二英语单项填空简单题查看答案及解析

From what she has done we can predict that she is ______enough to make up her own decision and behave in a proper way.

A. positive        　　 B. severe                C. mature            D. admirable

高二英语单项填空中等难度题查看答案及解析