The doctor said jokingly that his own infecti...

The doctor said jokingly that his own infection of the virus _______ the discovery of a vaccine ()of the disease.

A. stood for           B. called for         C. paid for        D. contributed to

高二英语单项填空简单题查看答案及解析

Scientists are working to stop a deadly virus that infects(感染)pigs. The virus is causing huge losses for farmers in China and other Asian countries. Many farmers have tried to contain African swine flu by quarantining(隔离)pigs and destroying infected animals. But the spread of the disease into East Asia has stepped up the search for other ways to deal with the problem.

The virus had not been considered a major concern for researchers until it appeared in China last year. Chinese farmers raise about half of the world's pigs. Some researchers think the virus might have come from infected animals in Eastern Europe or Russia. Since then, it has spread to China, Vietnam and other Asian countries. Millions of pigs have been destroyed.

Although swine flu does not sicken people, it is very infectious and deadly to pigs. "Today's situation, where you have this global danger, puts a lot more emphasis on this research,” said Doctor Luis Rodriguez. He spoke to The Associated Press. Rodriguez leads the United States government laboratory for foreign animal diseases at Plum Island , New York. As a deadly virus kills pigs across Asia, scientists are accelerating efforts to develop a vaccine (疫苗).

Vaccines often are developed by killing a virus before it is put into an animal. The disabled virus does not make the animal sick, but it activates the body's natural defenses against disease. The immune(免疫的)system is then able to identify the virus and produce antibodies against it.

However, this method is not effective with all viruses including the one that causes African swine flu. For swine flu, scientists have been working on a different kind of vaccine. It is made from a weakened virus, not a dead one. The problem for researchers has been how to change the virus so it can be safely used.

Vietnam's government reported a few weeks ago that it was testing vaccines, but provided few details of its programs. In China, the government said scientists are working on a vaccine that genetically changes the virus. That is similar to a method being used by scientists in the United States.

1.Why did the virus cause the researchers' concern when appearing in China?

A.The virus may infect people.

B.The number of pigs raised in China is huge.

C.The virus may be completely out of control.

D.Chinese science and technology is not advanced.

2.Where might the virus come from?

A.Eastern Europe or Russia. B.Vietnam.

C.African countries. D.America.

3.What is the function of the disabled virus according to Rodriguez?

A.It makes people fall ill.

B.It destroys the immune system of animals.

C.It helps the body produce antibodies against disease.

D.It makes the body's natural defense against disease work.

4.What is the best title for the text?

A.The Emphasis of the Virus Research

B.Swine Flu Leads to the Deaths of Lots of Pigs

C.Scientists Hurry to Develop Vaccine for Swine Flu

D.New Results About Government Laboratory for Animal Diseases

高二英语阅读理解中等难度题查看答案及解析

Donald had his own difficulties in sleeping that night. Not just because of the bright lights of the shelter or people’s constant voices, it was the happening repeatedly nightmare that caused him to stay awake, to fear sleep. Donald was back in his small house. He did his best to ignore the howling winds outside his window. Yet he could not turn out the fearful whimpers (呜咽) of his little dog, or the uncomfortable sounds of his mother anxious in her room next door, unable to sleep through the storm despite her insistence they would be all right.

Donald did not want his mother to be upset, but on some level, he was glad to hear she was awake, It meant he was not alone in the dark. Though he was 12, until recently it was impossible for Donald to fall asleep unless his mother lay down by his side.

Suddenly there was a crash. Their living room window is shattered (打碎) by 125 miles an hour winds. Troy rushed to Donald and sat anxiously on the edge of his bed. He did his best to calm his mother, and she had to comfort him. Soon water was seeping (渗入) into the single floor house. Quickly it rose from ankle level to leg level. At Donald’s insistence, they pushed their way through the water --- now chest high --- toward the front door. When they fought their way into the living room, water rose to their chins.

It was a struggle for the boy and mother to stay afloat. In a total panic, desperate to hold on to something, Troy caught a curtain rod. She was breathing hard, shouting that she couldn’t swim.

Donald cried out, “Mom! Hold on!” Just then Donald also caught a floatable wood board.

1.The passage is mainly about _____.

2.Which of the following is NOT mentioned in the story?

3.Which phrase can describe Troy’s feelings at the beginning of the storm most suitably?

4.What will the author most probably talk about next?

高二英语阅读理解中等难度题查看答案及解析

The winner of the Grand Slams said that he had owed his success to many people, his parents_________.

A. after all          B. by chance

C. on purpose      D. in particular

高二英语单项填空困难题查看答案及解析

When _________about the secret of his success, Spielberg said that he owed much of his success and happiness to his wife and children.

A. asked          B. being asked   C. was asked   D. asking

高二英语单项填空简单题查看答案及解析

21 ------ He runs his own company at the age of 21.

------- ___________________

A. Good luck!             B. That’s quite something

C. Congratulations!          D. It’s hard to say.

高二英语单项填空简单题查看答案及解析

名著翻译

1.It was Plato who said that his definition of thinking was “the soul talking to itself”.

2.Competition, if confronted enthusiastically, can be the greatest self-motivating experience in the world.

3.Helen Keller didn’t complain about not being given enough money from the government to compensate her for her disability.

4.The secret to a happy life is a sound mind in a sound body.

5.A vision should be judged by these criteria, the criteria of power and effectiveness.

高二英语英译汉困难题查看答案及解析

–It is said that Bob will drop out of school because his family cannot afford the school fee.

– _____, let’s give him a hand.

高二英语单项填空中等难度题查看答案及解析

The old man was so angry and spoke so fast that none of his children understood ____ he said meant.

高二英语单项填空简单题查看答案及解析

David said that it was because of his strong interest in literature ________ he chose the course.

A．that            B．what            C．why            D．how

高二英语单项填空中等难度题查看答案及解析