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This year’s flu season is pretty scary. To try to minimize the effects, public officials are still urging anyone who hasn’t yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫 苗)—with its excellent 36 percent effectiveness—would not prevent everyone from getting infected with the annoying virus. Knowledge is power, so here's what goes on in your body when you come down with the flu.
The influenza virus primarily attacks your nose, throat, and the tubes that lead to your lungs. But the flu is so much more than that. Your muscles ache, your head hurts, and your appetite goes down, among other things. To our surprise, almost all of these symptoms have less to do with the virus itself than with your immune( 免 疫 的)response to them. Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.
The virus usually enters through your mouth, typically by way of your hands . But it takes a few days for symptoms to set in. While this process might cause some harm to your nose and throat, it's nothing major, and nothing like the symptoms that typically accompany a bad or even mild case of the flu.
The real fun starts when your immune system begins to fight. Your immune system comes in two parts: the innate system and the adaptive. The innate immune system is essentially an all-purpose tool. As soon as your body senses the presence of any injury or invader , the innate immune system launches into action by producing tiny proteins called cytokines and chemokines. The cytokines reproduce almost immediately and start to attack the virus. This increase in immune cells creates a serious inflammation( 炎 症 ) throughout the body. But the worst is still to come.
Meanwhile, the chemokines work with the adaptive immune system to help create T cells. These cells are a special type of white blood cell that works in a much more specific way: They find the influenza virus, identify what's special about it, and create something unique on their surface that finds and destroys similar invaders.
1.What can we infer from Paragraph 1?
A. All the vaccine is not effective.
B. No one can avoid catching this year's flu.
C. This year's flu is the most serious one in recent years.
D. Public health officials have to use a gun when necessary.
2.Why many parts of your body suffer while you're recovering from a flu?
A. Because recovery from illness is painful.
B. Because your immune system is working against your defense system.
C. Because your body is fighting hard against the flu.
D. Because the influenza virus attacks your nose, throat and other parts.
3.The underlined word “fun” in Paragraph 4 can be replaced by .
A. joy B. battle
C. action D. program
4.What's the main idea of Paragraph 4?
A. The fight between innate immune system and the adaptive.
B. The categories of immune system.
C. The way immune system works.
D. The process of the development of immune system.
高二英语阅读理解困难题查看答案及解析
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It is pretty much a one-way street. While it may be common for university researchers to try their luck in the commercial world, there is very little traffic in the opposite direction. Pay has always been the biggest deterrent, as people with families often feel they cannot afford the drop in salary when moving to a university job. For some industrial scientists, however, the attractions of academia (学术界) outweigh any financial considerations.
Helen Lee took a 70% cut in salary when she moved from a senior post in Abbott Laboratories to a medical department at the University of Cambridge. Her main reason for returning to academia mid-career was to take advantage of the greater freedom to choose research questions. Some areas of inquiry have few possibilities of a commercial return, and Lee’s is one of them.
The impact of a salary cut is probably less severe for a scientist in the early stages of a career. Guy Grant, now a research associate at the Unilever Centre for Molecular Informatics at the University of Cambridge, spent two years working for a pharmaceutical (制药的) company before returning to university as a post-doctoral researcher. He took a 30% salary cut but felt it worthwhile for the greater intellectual opportunities.
Higher up the ladder, where a pay cut is usually more significant, the demand for scientists with a wealth of experience in industry is forcing universities to make the transition (转换) to academia more attractive, according to Lee. Industrial scientists tend to receive training that academics do not, such as how to build a multidisciplinary (多学科的) team, manage budgets and negotiate contracts. They are also well placed to bring something extra to the teaching side of an academic role that will help students get a job when they graduate, says Lee, perhaps experience in manufacturing practice or product development. “Only a small number of undergraduates will continue in an academic career. So someone leaving university who already has the skills needed to work in an industrial lab has far more potential in the job market than someone who has spent all their time on a narrow research project.”
1.By “a
one-way street” (Line 1, Para. 1), the author means ________.A. university researchers know little about the commercial world
B. there is little exchange between industry and academia
C. few industrial scientists would quit to work in a university
D. few university professors are willing to do industrial research
2.The word “deterrent” (Line 3, Para. 1) most probably refers to something that ________.
A. keeps someone from taking action
B. helps to move the traffic
C. attracts people’s attention
D. brings someone a financial burden
3.What was Helen Lee’s major consideration when she changed her job in the middle of her career?
A. Flexible work hours.
B. Her research interests.
C. Her preference for the lifestyle on campus.
D. Prospects of academic accomplishments.
4.Guy Grant chose to work as a researcher at Cambridge in order to ________.
A．do financially more rewarding work
B．raise his status in the academic world
C．enrich his experience in medical research
D．take advantage of better intellectual opportunities
5.What contribution can industrial scientists make when they come to teach in a university?
A．Increase its graduates’ competitiveness in the job market
B．Develop its students’ potential in research.
C．Help it to obtain financial support from industry.
D．Adapt its research to practical applications.
高二英语阅读理解中等难度题查看答案及解析
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Moving to a new neighborhood，town，state，or even country can be a pretty scary experience. All you know is that things will be different and chances are you won’t know the kids at your new school.
The experiences that go with moving make many kids feel nervous and worried. This is perfectly normal but don’t let these emotions overrun your thoughts! You will soon get used to your surroundings and find new friends at your new school.
Leaving old friends and familiar places behind can be difficult. However，as you begin the moving process，keep in mind that saying goodbye to your old house，school，and friends does not mean that you have to forget them or that your farewell is permanent！If you’re moving to a new state or even a different country and won’t see your friends for a long time，don’t despair.
Make sure to ask everyone for their address so you can write them letters. Also，thanks to the Internet，it is very easy to stay in touch through email or instant messaging technologies. With your parent’s permission，you can even create a blog or web page to chronicle（记载） all of your new experiences. Include your thoughts，tales of your new adventures，even pictures of new friends，your new house，and new town. Your old friends will love seeing what you are busy with.
Many schools have an orientation（培训） program where a student already established at the school shows a new student around for their first week. This can help you to find your way around the school and to make new friends faster.
While moving is tough on kids of any age，high school counselor Karen Turner says moves can be particularly difficult for teens .“I think moving during adolescents is an extremely stressful experience，especially if you are into your junior high or senior year. Students tend to have established a very strong peer network during that period in their lives. Often this has more influence on them even than their families in some cases，and when they are torn from that there’s often resentment(怨气)．”However，Turner adds that while moving isn’t easy，there are things that your parents and the school can do to help you deal with the change.
1.Who are the intended readers of the passage?
A．Education experts. B．School teachers.
C．Parents. D．Students.
2.Which of the following is mainly suggested in Paragraph 3?
A．Staying in contact with old friends.
B．Expressing yourself when it is possible.
C．Forming good habits at school.
D．Keeping positive about your new school.
3.According to the passage，Karen Turner may agree that________．
A．many parents seem to care little about their children
B．teens can easily be attached to their friends
C．parents should communicate with the school teachers
D．teens tend to behave rudely in a new school
4.If this passage continues，what would the author further discuss?
A．What a new school is like.
B．Why parents move with their children.
C．How parents and the school can help the children.
D．How children can express their anxiety.
高二英语阅读理解中等难度题查看答案及解析
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"Thanks" to the seasonal change, half of my class went down with colds and flu. You can hear coughs and sneezes everywhere, and the number of suffering students keeps climbing.
A close friend of mine, however, survived the fierce battle, despite the fact that he was surrounded by "victims" all day long. I am not surprised, because we've been friends for ages, and he seldom gets sick. The following is his advice.
1.____________.
A long-distance run in the morning is a good choice. It not only makes you energized for the rest of the day, but also helps to develop good health for the rest of your life.
2.____________.
Eat a variety of food every day, because different foods contain different nutrition: rice provides sugar, meat contains energy and fat, vegetables are rich in vitamins and cellulose, etc. Fruit and yogurt are also highly recommended, because the former is known for its Vitamin C, and the latter, calcium, which plays a vital role in the growth of our bodies.
3.____________.
Water is one of the most important components of our bodies, and is essential for our metabolism. We often run out of water without notice, so we should drink water even if we are not thirsty. Besides, when we get sick, we should drink more, because when our bodies fight against viruses, it causes us to lose water.
4.____________.
A person in low spirits is more likely to get sick. A happy mood not only helps people defend against viruses, but also is a best cure for most illnesses.
Follow the above rules, and you'll become as strong as a bull! Remember: diseases and viruses are not that frightening as long as you are well prepared.
A. Keep optimistic and active
B. Get plenty of exercise
C. Keep drinking water
D. Have a balanced diet
高二英语信息匹配中等难度题查看答案及解析
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During the power transition earlier this year, analysts said, Chinese leaders tried to demonstrate their _______ to fighting corruption.
A. greed B. commitment
C. rensponsibility D. motivation
高二英语单项填空中等难度题查看答案及解析
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—My family usually holds a big party for my birthday, but I want to try a different way this year.
—________
A. It's your business. B. Come along! C. Like what? D. So what?
高二英语单项填空中等难度题查看答案及解析
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—My family usually holds a big party for my birthday, but I want to try a different way this year．
—________.
A．Go ahead． B．Come along! C．Like what? D．So what?
高二英语单项填空困难题查看答案及解析
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单词拼写
1.Thunders ________________ (陪伴/伴随) by heavy rain in this season are very common.
2.It is hard to see how the issue can be resolved to everyone's __________________ (满意/满足).
3.The new fivestar hotel will have ____________ (住宿) for more than 2,000 people.
4.During the civil war, thousands of people f____________ (逃避/逃离) from the country.
5.It is _____________ (催促/极力主张) that we (should) take measures to protect the environment.
6.Most states guarantee the right to free and ______________ (足够的/充分的) education.
7.The men ______________ (沉迷/放弃) themselves to drinking alcohol when they were in sorrow.
8.As we know, the exhibition is held ____________ (每年的).
9.These creatures live in the ___________ (深处) of the ocean.
10.This is certainly a ___________ (理论上的/假设的) risk but in practice there is seldom a problem.
高二英语单词拼写中等难度题查看答案及解析
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Work started this week on next season’s flu vaccine (疫苗), with experts working off forecasts about which types of the flu virus will be making the rounds. But don’t expect any improvements. Flu experts are already admitting that most vaccines will give at best basic protection, because they’re based on old-fashioned technology. It’s not a new problem, but one that the slow-moving world of drug and vaccine production seems helpless to improve upon.
Every flu vaccine is a cocktail, aimed at either three or four of the most common flu types. Flu vaccines must be recreated every year because flu viruses develop constantly in a process called antigenic drift. In February, global flu experts gather to trade notes on what viruses are circulating in different countries and to come to an agreement on which types the next vaccines should be made to target.
In recent years, flu vaccines have been based on H1N1, H3N2 and either one or two types of influenza B virus. Each of these has a “reference” type, which is used to make seed virus. Producers add the seed types to eggs and incubate (孵) them as the virus grows. Then they purify the virus, and either weaken it or kill it to make a vaccine.
Using eggs is a tricky (=difficult) and unpredictable process. Sometimes the virus doesn’t grow well in eggs, which can mean less vaccine than expected. The result is a flu vaccine that doesn’t offer much protection. “As long as we have eggs we are going to have this problem,” said Scott Hensley, a flu virus expert, “The only solution is not to depend on eggs.”
Flu is a major killer. The 2017-2018 season has been a severe one, hitting the entire U. S. with widespread influenza infection (感染) at once for weeks on end, and killing 97 children so far. Against this threat, even a less satisfying flu vaccine will definitely help. “Even when you have these mismatches it will not prevent infection but likely prevent disease severity,” said Hensley.
1.Next season flu vaccine fails to improve because ______.
A. it has offered the best protection
B. experts can’t forecast the flu types
C. it is based on outdated technology
D. experts are unwilling to respond to changes
2.According to Paragraph 2, flu experts ______ in February.
A. exchange views on the virus types next season
B. get together and make a deal on vaccines
C. sign an agreement on vaccine production
D. decide on how to circulate the viruses
3.The risk of using eggs to make vaccines may be that ______.
A. seeds are less likely to get protection
B. viruses might not be developed as expected
C. there are not enough eggs to be used
D. whether vaccines will grow is hard to predict
4.What message does the underlined sentence convey?
A. The U. S. is faced with serious flu attacks.
B. Egg-based vaccines are better than nothing.
C. There is something wrong with flu vaccines.
D. Flu vaccines can stop the disease spreading.
高二英语阅读理解困难题查看答案及解析
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With golden sunshine and a gentle breeze（微风）, autumn is the most beautiful seasons in the year. This is a great time to go outside and have fun. Go to a valley to see red maple trees,go and pick fruit in an orchard or find an open field to fly your kite in.
However, for many high school students, these great activities may be just a dream. With plenty of work to do, they spend all their hours indoors, struggling for a high mark in their exams. Of course, study is one of the most important things for teenagers. But life is definitely much more than that.
Sometimes we spend so much time studying that we forget how to make life wonderful. In doing so, we lose the real purpose of life —to be a valuable and happy person. To enjoy just how great it is to be alive, we have to put down our books and pens and look around us. Students, take some exercise to improve your health, talk with your parents and friends for understanding and walk around outside to refresh（振作）our body and mind.
Going out and enjoying the beautiful countryside often helps our creativity in our work. Chinese craftsman, Lu Ban created a saw to help woodworkers. But if he hadn’t walked outside, he would not have been inspired by a kind of toothed（锯齿状的）grass. We could also suppose if Newton hadn’t rested under that apple tree, then he wouldn’t have been hit by an apple, and his classic（经典的）theories would not have come out.
Going out is not only a break from hard work, but a chance to add to life experience. So come on, give your brain a good rest. Step out of the books and get your bag ready for an autumn outing. We are sure you will get much more than knowledge from the exciting journey.
1.In which paragraph does the writer make a summary about his opinion?
A.Paragraph 1. B.Paragraph 2.
C.Paragraph 4. D.Paragraph 5.
2.Why is going out a dream for many high school students?
A.They are unhappy to do so.
B.They have too much work to do for getting high marks in the exams.
C.Their parents don’t allow them to do so.
D.They think study is the most important thing for them.
3.The passage is developed mainly by______________.
A.describing the beautiful scenery in Autumn
B.pointing out the present situation of high school students
C.making predictions
D.reasoning and giving examples
4.What message can you learn from the passage?
A.Going out can make high school students get more.
B.Nature is power.
C.All work and no play makes Jack a dull boy.
D.The author isn’t happy with our education at all.
高二英语阅读理解中等难度题查看答案及解析
one-way street” (Line 1, Para. 1), the author means ________.