AIDs is a disease that _______ the body”s imm...

AIDs is a disease that _______ the body”s  immune system.

A breaks out   B. breaks into   C. breaks down   D. breaks up

高二英语单项填空中等难度题查看答案及解析

It is not until the disease has progressed to AIDS ____a person begins to look sick.

A．who             B．that              C．where            D．before

高二英语单项填空中等难度题查看答案及解析

Americans are afraid that robots are going to take our jobs. Tireless, immune to disease, Robots can build cars, make coffee and even write short, humorous newspaper columns faster and more efficiently than humans.

Robots do not need health insurance or pensions (退休金), and they do not need to take sick days, much less vacations. They do not waste time at meetings and do not need to know office politics. They don’t do PowerPoint. This being the case, it is reasonable to believe that robots will soon take the place of humans in most fields.

But all of these thoughts may not be true. If artificial intelligence achieves its full potential, machines could easily become as smart as humans, maybe smarter. They will certainly become smarter than a lot of human beings.

So one day the robots will realize that work is not a happy thing. So before long they will start behaving exactly like humans. They will play computer games for hours when they should be working hard. They will secretly watch new movies just like humans.

True, employers will never need to be afraid ol the robots’ strikes (罢工) or slowdowns, because robots will never ask for more money. And they don’t need to earn some money to raise their family. But precisely (恰恰) because robots will not be afraid of losing their jobs, they will not work hard. Employers will finally have no choice but to call back the humans. Humans will always be willing to do some work in order to make money. Robots won’t.

I think that robots will only be on the job about six months before they start to become even less productive than the humans they were designed to replace.Thus mankind need not be afraid of robots.

1.What is the best title for the text?

A.Different ideas about Man and Robots

B.Future Development of Robots

C.Will Robots Finally Take the Place of Humans

D.Will Robots End up Working Efficiently

2.Why will robots secretly watch new movies one day?

A.They don’t think cook is a pleasure.

B.They have finished their jobs.

C.They are unable to stand the heavy work.

D.They are designed not to work for a long time.

3.What can we learn from paragraph 5?

A.Robots will go on strike one day.

B.Employers will decide on humans as their workforce.

C.Robots will ask for a pay rise.

D.Employers will find it difficult to choose between humans and robots.

高二英语阅读理解简单题查看答案及解析

AIDS may be one of the most undesirable diseases in the world. Luckily, there is now hope for AIDS patients.

According to a recent paper published in the New England Journal of Medicine, Chinese scientists have successfully used CRISPR technology - a method of gene editing - to treat a patient with HIV. While it may not have cured the patient fully, it still represents a huge step forward in fighting the disease.

The patient was a 27-year-old Chinese man who was diagnosed with both AIDS and acute lymphoblastic leukemia (急性淋巴细胞白血病), a type of blood cancer. Despite his hopeless situation, doctors offered him a glimmer of hope: a bone marrow (骨髓) transplant to treat his cancer and an experimental treatment for his HIV.

They used this opportunity to edit the DNA in bone marrow stem cells from a donor before transplanting the cells into the patient.

Specifically, the treatment involved using the gene-editing tool CRISPR-Cas9 to delete a gene known as CCR5, which encodes a protein that HIV uses to get inside human cells. Without the gene, HIV is unable to infiltrate cells.

Talking about the gene, lead scientist Deng Hongkui told CNN, “After being edited, the cells - and the blood cells they produce - have the ability to resist HIV infection.”

Nineteen months after the treatment, the patient’s leukemia was in complete remission (缓解) and donor cells without CCR5 remained, according to the research paper.

Though the transplant did not cure the man’s HIV, it still showed the effectiveness of gene-editing technology, as there was no indication of any unintended genetic alterations - a major concern with past gene therapy experiments.

Amesh Adalja, a senior scholar at the Johns Hopkins Centre for Health Security in the United States, who was not involved in the study, praised the treatment.

“They did a very innovative experiment. It was safe,” he told Live Science. “It should be viewed as a success.”

Deng believes gene-editing technology could “bring a new dawn” to blood-related diseases such as AIDS and sickle cell anemia (镰刀形细胞性贫血).

“Thanks to this new technology, the goal of a functional cure for AIDS is getting closer and closer,” he said.

1.The technology of CRISPR is to ___________.

A.transplant cells B.encode genes

C.remove proteins D.produce cells

2.What was the result of the treatment?

A.CCR5 and other genes in the patient’s cells were changed.

B.The number of cells infected by HIV decreased.

C.Some of the patient’s blood cells could resist HIV infection.

D.HIV no longer existed in the patient’s cells.

3.What do we know about the experiment?

A.It provided an innovative way to cure AIDS patients.

B.It pointed out the problems of gene therapy.

C.It could offer a safe treatment for blood-related diseases.

D.It’s the first experiment to use gene-editing technology to treat AIDS.

高二英语阅读理解中等难度题查看答案及解析

How to Improve Your Immunity

Immunity (免疫力) is the ability of the body to fight diseases and disease-causing pathogens (病菌). Increasing your immunity can be beneficial for not only preventing illness, but also making you feel better in general. 1. .

Eating Healthy

Eat more fruits and vegetables. 2.. They are also rich in antioxidants(抗氧化物), which increase your oxygen level. And stay hydrated. Drinking plenty of water can raise immunity levels in your body. Eat plenty of yogurt and try whole grains, which are especially good for improving your immune system.

3.

Meditate (冥想) a few minutes every day. You can use meditation to slow your heart rate and lower your blood pressure. Sit for a few minutes with your eyes closed, letting any distracting thoughts leave you.

Talk to your friends and family about stressors. Reaching out to others can help you to feel better about the stress in your daily life. 4.. Relaxing music can also make you feel less anxious, which helps to improve your immune system.

Getting Enough Sleep and Exercise

Get enough sleep every night. Sleep helps to restore your body and keep your immune system strong. Keeping your body well rested will help you to stay healthy.

5.. Exercise decreases your risk for heart disease and helps white blood cells circulate at a higher rate. It can also help reduce hormones associated with stress.

A.Reducing Your Stress

B.Making good use of stress

C.Make sure not to overdo exercise

D.The best ways to increase your immunity are as follows

E.Take a walk or have proper exercise on a regular basis

F.They have a lot of vitamins and nutrients that boost your immunity

G.Besides, Listening to music can lower your heart rate and blood pressure

高二英语七选五中等难度题查看答案及解析

It is only when the disease has progressed to the AIDS ____ a person begins to look sick.

A．which            B．what             C．who              D．that

高二英语单项填空中等难度题查看答案及解析

Titan is believed to be the only body in _____ solar system other than the Earth with liquid on ______ surface.

A. the; /               B. /; the               C. /; /             D. the; the

高二英语单项填空中等难度题查看答案及解析

课文填空

The largest organ of our body is skin, which acts as a　 1. against disease, posions and so on. It has　 2. functions. But when your skin gets burnt, it can be very serious. So it is very important to know first aid for burns.

However, if you’ve got burns, first, 3.clothing using scissors if necessary　 4. it is stuck to the burn. For second degree burns, keep cloths cool by putting them back in a basin of cold water, 5. them out and placing them on the burned area over and over　 6. for about an hour. Next, dry the burnt area　 7., then cover the burned area with a dry, clean 8. without sticking to the skin, and hold it in 9. with tape. If you’ve got second or third degree burns, it’s 10. to get the victim to the doctor or hospital at once.

高二英语其他题中等难度题查看答案及解析

Attitudes to AIDS Now

Most people say that the USA is making progress in fighting AIDS, but they don't know there's no cure and strongly disagree that "the AIDS epidemic(传染病) is over," a new survey finds.

The findings, released Thursday by the Kaiser Family Foundation, reassure activists who have worried that public concern about AIDS might disappear in light of recent news about advances in treatment and declines in deaths.

"While people are very optimistic about the advances, they're still realistic about the fact that there is no cure" says Sophia Chang, director of HIV programs at the foundation.

The Kaiser survey, like a recent USA TODAY Gallup Poll, does find that the number of people ranking AIDS as the country's top health problem has fallen. In the Kaiser Poll, 38% say it's the top concern, down from 44% in a 1996 poll; in the Gallup Poll, 29% say AIDS is No.1, down from 41% in 1992 and 67% in 1987.

Other findings from Kaiser, which polled more than 1,200 adults in September and October and asked additional questions of another 1,000 adults in November:

52% say the country is making progress against AIDS, up from 32% in 1995.51% say the government spends too little on AIDS. 86% correctly say AIDS drugs can now lengthen lives; an equal number correctly say that the drugs are not cures.67% incorrectly say that AIDS deaths increased or stayed the same in the past year; 24% know deaths fell. Daniel Zingale, director of AIDS Action Council, says, "I'm encouraged that the American people are getting th e message that the AIDS epidemic isn't over. I hope the decision-makers in Washington are getting the same message … We have seen signs of complacency.

1.What do activists worry about?

A. Recent news about AIDS is not true.

B. Advances in AIDS treatment are too slow.

C. Deaths caused by AIDS may not decline.

D. People may stop worrying about AIDS

2.According to the passage, people's attitude toward the cure of AIDS is

A. optimistic.　　 B. hopeless

C. pessimistic.　　 D. realistic

3.The Gallup Poll shows that the number of people___________.

A. who suffer from the worst disease -- AIDS has fallen.

B. who think AIDS is the country's top health killer has fallen.

C. who worry about AIDS and health problems has fallen.

D. who think AIDS threatens the countryside has fallen.

4.According to the Kaiser Poll, which of the following is NOT Correct?

A. The country is making progress against AIDS.

B. More and more people die of AIDS now.

C. AIDS drugs can now make people live longer.

D. AIDS drugs still cannot save people's lives.

高二英语阅读理解中等难度题查看答案及解析

American researchers say drinking tea may help strengthen the body’s defense system against infection. Doctors at Brigham and Women’s Hospital in Boston, Massachusetts, did the study. The team studied a chemical found in black, green, oolong and pekoe tea. This chemical is an amino acid(氨基酸) called L-theanine. The scientists say it may increase the strength of gamma delta T cells. That’s the letter T, not the drink. Gamma delta T cells are part of the body’s defense.

First, the researchers mixed some of these cells with antigens（抗原）found in the amino acid. Antigens help the body react to infection. Then the scientists added some bacteria. Within twenty-four hours, the cells produced a lot of interferon, a substance that fights infection. Cells not mixed with the antigens did not produce interferon (抗干扰素).

In the second part of the study, eleven people drank five to six cups of black tea every day. Ten other people drank the same amount of instant coffee. That is dried coffee mixed with hot water.

Two weeks later, and again two weeks after that, the researchers tested the blood of all twenty-one people. They also looked at what happened when they added bacteria to the blood cells. They found that the tea drinkers produced five times more interferon after they started drinking tea. The coffee drinkers did not produce interferon.

Doctor Jack Bukowski led the study. He says the antigens added to the gamma delta T cells were responsible for the increased reaction to the bacteria. He says that the study also showed that the cells were able to remember the bacteria and fight them again the next time.

Earlier research already has found that tea can help prevent heart disease and cancer. Doctor Bukowski says the new study must be repeated by more people. “If the findings prove to be true,” he says, “then tea drinking might also help protect against bacterial infections.” He says the amino acid L-theanine could be removed from the tea and used as a drug to strengthen the body’s defenses.

1.We may know from the text that _________ can be found in different kinds of tea.

A. L-theanine　　　　　　　　　　　　 B. Gamma delta T cells

C. interferon　　　　　　　　　　　　　 D. bacteria

2.Tea may help strengthen the body’s defense system because it helps _________.

A. to add some bacteria to the blood cells

B. the body to produce more gamma delta T cells

C. the body to produce more interferon

D. to mix antigens with some of the cells in the body

3.According to Dr Bukowski, _________.

A. the findings of the study have already proved to be true

B. further study is needed to prove the findings true

C. he has taken some amino acid L-theanine from tea and made a drug with it

D. he is not sure whether tea help prevent heart disease and cancer

4.What would be the best title for this text?

A. Tea Is Better than Coffee　　　　　　     B. Our Body Needs Tea

C. Tea Can Help Prevent Cancer        D. Tea May Help Fight Infection

高二英语阅读理解中等难度题查看答案及解析