Stricter measures are required to prevent out...

Stricter measures are required to prevent outside infection _____ from entering locations with a closed environment.

A.sources B.resources C.consequences D.guidelines

高三英语单项填空中等难度题查看答案及解析

How to prevent being infected with the virus? There are a number of standard hygiene (卫生) practices 1. have been recommended to protect against infection and 2.(far) spread. These include covering your mouth and nose when coughing or sneezing with a medical mask, tissue or flexed elbow; avoiding contacting with those who are unwell 3.(close); the appropriate use of masks and personal protective 4.(equip), especially in a healthcare setting; washing hands regularly with water and soap, 5. alcohol-based hand sanitizer (洗手液). 6.(action) that can be taken to prevent infection from an animal source include: avoiding unnecessary unprotected contact with animals; washing hands after contact with animals or animal products; and ensuring that animal products are cooked thoroughly before they 7.(consume).

It is important8.(stay) home if you’re feeling unwell. But if you have a fever, cough, and difficulty 9.(breath), seek medical care early and share your previous travel history 10. your healthcare provider.

高三英语语法填空中等难度题查看答案及解析

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

How to prevent being infected with the virus? There are a number of standard hygiene (卫生) practices 1. have been recommended to protect against infection and 2. (far) spread. These include covering your mouth and nose when coughing or sneezing with a medical mask, tissue or flexed elbow; avoiding contacting with those who are unwell 3. (close); the appropriate use of masks and personal protective 4. (equip), especially in a healthcare setting; washing hands regularly with water and soap, 5. alcohol-based hand sanitizer (洗手液). Actions that can be taken to prevent infection from 6. animal source include: avoiding unnecessary unprotected contact with animals; washing hands after contact with animals or animal products; and ensuring that animal products are cooked thoroughly before they 7. (consume).

8. is important to stay home if you’re feeling unwell. But if you have a fever, cough, and difficulty 9. (breath), seek medical care early and share your previous travel history 10. your healthcare provider.

高三英语语法填空中等难度题查看答案及解析

Agricultural officials this week said strict control measures are in place, ____ to prevent the red fire ants spreading across the country.

A. intended    B. to intend      C. to be intended  D. having intended

高三英语单项填空困难题查看答案及解析

Passage seven(Stricter Traffic Law can Prevent Accidents)

From the health point of view we are living in a marvelous age. We are immunized from birth against many of the most dangerous diseases. A large number of once fatal illnesses can now be cured by modern drugs and surgery. It is almost certain that one day remedies will be found for the most stubborn remaining diseases. The expectation of life has increased enormously. But though the possibility of living a long and happy life is greater than ever before, every day we witness the incredible slaughter of men, women and children on the roads. Man versus the motor-car ! It is a never-ending battle which man is losing. Thousands of people the world over are killed or horribly killed each year and we are quietly sitting back and letting it happen.

It has been rightly said that when a man is sitting behind a steering wheel, his car becomes the extension of his personality. There is no doubt that the motor-car often brings out a man’s very worst qualities. People who are normally quiet and pleasant may become unrecognizable when they are behind a steering-wheel. They swear, they are ill-mannered and aggressive, willful as two-years-olds and utterly selfish. All their hidden frustrations, disappointments and jealousies seem to be brought to the surface by the act of driving.

The surprising thing is that society smiles so benignly on the motorist and seems to condone his behaviour. Everything is done for his convenience. Cities are allowed to become almost uninhabitable because of heavy tragic; towns are made ugly by huge car parks; the countryside is desecrated by road networks; and the mass annual slaughter becomes nothing more than a statistic, to be conveniently forgotten.

It is high time a world code were created to reduce this senseless waste of human life. With regard to driving, the laws of some countries are notoriously lax and even the strictest are not strict enough. A code which was universally accepted could only have a dramatically beneficial effect on the accident rate. Here are a few examples of some the things that might be done. The driving test should be standardized and made far more difficult than it is; all the drivers should be made to take a test every three years or so; the age at which young people are allowed to drive any vehicle should be raised to at least 21; all vehicles should be put through stringent annual tests for safety. Even the smallest amount of alcohol in the blood can impair a person’s driving ability. Present drinking and driving laws (where they exist) should be mad much stricter. Maximum and minimum speed limits should be imposed on all roads. Governments should lay down safety specifications for manufacturers, as has been done in the USA. All advertising stressing power and performance should be banned. These measures may sound inordinately harsh. But surely nothing should be considered as to severe if tit results in reducing the annual toll of human life. After all, the world is for human beings, not motor-cars.

1.The main idea of this passage is

A.Traffic accidents are mainly caused by motorists.

B.Thousands of people the world over are killed each year.

C.The laws of some countries about driving are too lax.

D.Only stricter traffic laws can prevent accidents.

2.What does the author think of society toward motorists?

A.Society smiles on the motorists.

B.Huge car parks are built in the cities and towns.

C.Victims of accidents are nothing.

D.Society condones their rude driving.

3.Why does the author say:’ his car becomes the extension of his personality?’

A.Driving can show his real self.

B.Driving can show the other part of his personality.

C.Driving can bring out his character.

D.His car embodies his temper.

4.Which of the followings is NOT mentioned as a way against traffic accidents?

A.Build more highways.

B.Stricter driving tests.

C.Test drivers every three years.

D.raise age limit and lay down safety specifications.

5.The attitude of the author is

A.ironical        B.critical     C.appealing      D.militant

高三英语阅读理解简单题查看答案及解析

More strict measures should be taken____more people are infected with the virus of H1N1 flu.

高三英语单项填空简单题查看答案及解析

According to a recent study, a new genetically modified rice can prevent infections of HIV, the virus responsible for the disease AIDS.

The study reports the newly-developed rice produces proteins that attach directly to the HIV virus. This process prevents the virus from mixing with human cells. The scientists say it can remove the effect of the virus and block its spreading.

The Joint United Nations Program on HIV/AIDS reports that worldwide, nearly 37 million people were living with HIV in 2017. The organization says the largest number of those are in developing countries. Nearly two-thirds of HIV cases are in Africa. Now there is no cure for HIV/AIDS though there have been developments in oral drug treatments to slow the progression of the disease.

The new study predicts the rice-based method will lead to long-term use of the anti-HIV treatment across the developing world. Researchers said the “groundbreaking” discovery is “realistically the only way” that anti-HIV combination treatments can be produced at a cost low enough for the developing world.

They say the easiest and most cost-effective way to use the rice will be to make it into a cream to be put on the skin. The HIV-fighting proteins can then enter the body through the skin. People all over the world could grow the rice and make the cream themselves. This would prevent the cost and travel required for many patients to receive treatments and medicine.

The process of changing the genetic structure of food crops has been debated for some time. Critics of genetically engineered crops believe they can harm people. The scientific team says further testing is needed to ensure that the genetic engineering process does not produce any additional chemicals that could be dangerous to people.

1.What does the author intend to do in paragraph 3?

A. Stress the urgency of HIV treatments.

B. Provide some data about HIV.

C. Remind readers of HIV prevention.

D. Introduce HIV to the public.

2.In which way will the rice be used at the lowest cost?

A. By transforming it into proteins. B. By adding it to an oral drug.

C. By attaching it to the HIV virus. D. By processing it into a cream.

3.What can we infer about the genetic engineering process?

A. It can prevent infections of HIV. B. It can produce dangerous chemicals.

C. It still requires perfecting. D. It applies to the developed world.

4.From which is the text probably taken?

A. A biology textbook. B. A health magazine.

C. A social webpage. D. A first aid brochure.

高三英语阅读理解中等难度题查看答案及解析

The flu season arrives so predictably, and affects so many of us, that it’s hard to believe that scientists have had very little idea why cold weather helps germs to spread.

Worldwide, up to five million people catch the illness each flu season, and around a quarter of a million die from it. Part of its power comes from the fact that the virus changes so quickly that the body is hardly prepared. “The antibodies we’ve built up no longer recognize the virus – so we lose our immunity,” says Jane Metz at the University of Bristol. It also makes it harder to develop effective vaccines, and even if one comes out, governments often fail to persuade enough people to take it up.

The hope is that by understanding better why flu spreads in winter, but naturally fades in summer, doctors could find simple measures to stop its spread.

Previous theories had centred on our behaviour. We spend more time indoors in the winter, meaning that we’re in closer contact with other people who may be carrying germs.

Another popular idea concerned our physiology(生理机制): the cold weather weakens your body’s defenses against infection. In winter, without much sunlight, we may run low on Vitamin D, which helps power the body’s immune system. Moreover, when we breathe in cold air, the blood vessels in our nose shrink, which affects the normal function of white blood cells, allowing viruses to slip past our defenses unnoticed.

While such factors both play some role, analyses suggested another ignored cause may have been lying invisible in the air that we breathe. Thanks to the laws of thermodynamics(空气热力学), cold air can carry less water vapor before it reaches the “dew point” and falls as rain. So while the weather outside may seem wetter, the air itself is drier as it loses the moisture. And researches in the past few years has shown that these dry conditions seem to offer the perfect environment for the flu virus to flourish.

In wetter air, the epidemic struggles to build strength, while in drier conditions it spreads like wildfire. And comparing 30 years’ climate records with health records, Jeffrey Shaman at Columbia University found that flu epidemics almost always followed a drop in air humidity.

1.What can we infer from the second paragraph ?

A.We lose immunity due to the absence of our antibodies.

B.The antibodies fail to function due to variation of virus.

C.Government should come up with better ways to persuade people.

D.One in four of the infected die from the influenza each flu season.

2.What is the purpose of understanding better why flu spreads in winter?

A.To help develop effective vaccine.

B.To seek ways to treat people infected with flu.

C.To figure out ways to cut off its transmission.

D.To explore how to defend our immune system.

3.In what weather condition a flu epidemic is more likely to occur ?

A.Destroying bodies’ immune system.

B.Powering our bodies’ immune system.

C.Killing numerous viruses that we take in.

D.Stopping us acquiring enough Vitamin D.

4.What is the best title of the passage?

A.Ways to prevent infection of flu B.Flu-A disease not so hard to prevent

C.A predictable flu season D.Why germs spread in winter

高三英语阅读选择简单题查看答案及解析

Prevent Viruses From Infecting Your Computer

The number one way to prevent viruses from infecting your computer is to have an anti﹣virus software on your computer, which can detect and block viruses before they have a chance to cause any harm. 1. If it finds any viruses, it can separate them and delete them safely from your computer. Because there are new viruses that are created on an almost daily basis, your virus protection needs to be updated regularly.

2. This way if your computer should ever get hit by a virus, which corrupts some of your system. you will have a back up copy available. 3. This will allow you to restart your computer using an earlier configuration （配置）before you got infected by the virus. This method is not always reliable but it is something that you can try.

An important rule of thumb is do not open attachments in emails from people you do not know. You have no idea what those attachments might contain and no idea who sent them. You should also be careful about opening attachments from people you do know if you are not sure what the attachment is about. 4.

Downloading is a good way to catch a computer virus. It's like opening the door and saying "Come on in! " Yes, if your virus protection is updated, it will hopefully catch the virus. 5. When downloading, make sure the site you are downloading from is reliable with a lot of traffic. Stay away from unreliable sites that have few visitors.

A.Not all viruses act immediately.

B.But then again, it might not.

C.Operating without a firewall is risky anyway.

D.Attachments are a good way for viruses to sneak into your systems.

E.A good anti﹣virus program can scan any program, files, or documents.

F.Another good way is to make backup copies of important documents and files.

G.You can even set a system restore point anywhere from a week or a month earlier.

高三英语七选五简单题查看答案及解析

Chicago is considering firm measures to prevent the Asian carp，a giant fish native to the Far East, from coming into North America’s Great Lakes in large numbers. Such a move could cost up to$18bn, a heavy economic burden to the city.

This species, more than a metre in length, was originally introduced to southern US states three decades ago to control weeds in sewage (污水) treatment plants. But they escaped into the Mississippi River and increased in number quickly, making their way north towards the Great Lakes and threatening the native fish species along the way.

“Dozens of them will often leap out of the water as boats approach.’’ Michael Beecham，a local environmental expert, described how frightening the scene was. “I’ve gone down the river and seen these fish jump up and hit me in the face．It is a big problem for our native species.” he said.

A meeting has been organized to find a technological solution to the carp problem, one of which involves blocking parts of Chicago’s canal system．Listening at the meeting was John Goss, who was worried about the effect that having barriers in the canal system would have on industry. “It would certainly increase the cost of transportation,” he told. “It is currently very cheap and efficient to bring materials and finished goods down the Chicago ship canal.’’

Another cheaper option is to eat the fish out of existence. Dirk Fucik is selling carp burger(鲤鱼汉堡包) at his fish shop not far from downtown Chicago．He thinks the carps are a great resource. “To catch it and throw it away is a waste,” he says. “Eating them helps solve the problem and also provides jobs.” But the idea has not yet caught on．So far，he is the only person in Chicago selling carp burgers.

1.What can we learn about the Asian carp according to the passage?

A. It is very adaptable to the new environment.

B. It is originally used to control weeds in the Great Lakes.

C. It has become a new food in many restaurants.

D. It has caused parts of Chicago’s canal system to be blocked.

2.From John Goss’s point of view，the building of barriers ______________.

A. can force the Asian carp out of the Great Lakes

B. may lead to the increasing cost of industrial products

C. will help the canal system work more efficiently

D. will bring high profits to the related companies

3.What can be inferred from the last paragraph of the passage?

A. The Americans have included the Asian carp in their food list.

B. Catching Asian carps has created many jobs in America．

C. Dirk Fucik is a pioneer in selling carp burgers in Chicago．

D. Throwing away the caught fish is a waste of the resources．

4.What’s the best title of the passage?

A. Chicago goes to war with Asian carps

B. The Asian carp escapes from the Great Lakes

C. Possible ways to handle non-native species

D. The Great Lakes, new home for Asian Carps

高三英语阅读理解中等难度题查看答案及解析