D Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunityand resistance in humans, the scientists said.? “We want 题目和参考答案——青夏教育精英家教网—

题目内容

Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunity(免疫)and resistance in humans, the scientists said.?

“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits, such as immunity,” said Robin May of the University of Birmingham, who led the study.?

Populations across the world are aging at a surprising pace, bringing potentially big challenges for health and social care systems. A study by Danish scientists last year found that half of babies born in the rich world today will live to celebrate their 100th birthdays. Scientists are eager to find out how people age to try to develop drugs to help them stay healthier as their lives extend.?

“What we have found is that things like resistance and aging tend to go hand in hand,” May said in an interview.?

May’s team compared longevity, stress resistance and immunity in four related species of worm. They also looked for differences in the activity of DAF-16 in each of the four species, and found that they were all quite distinct.?

May said DAF-16 was active in most cells in the body and was very similar to a group of human genes called FOXO genes, which scientists believe play a role in the aging process.?

“The fact that subtle（微妙的）differences in DAF-16 between species seem to have such an impact on aging and health is very interesting and may explain how differences in lifespan and related traits have arisen during evolution,” May said.?

71. In which section may the text appear in a newspaper? ?

A. Education. B. Science. C. Entertainment. D. Culture.

72. According to May_________,.?

A. resistance has a lot to do with aging?

B. FOXO genes can be found in worms?

C. genes play the same role in different species?

D. new drugs will change the genes in older people

73. What can we know from the third paragraph??

A. New ways have been found to affect aging. ?

B. Babies in the rich world will all live longer. ?

C. Present social care systems are poorly managed.?

D. Aging populations are causing more challenges.

74. From the text we know that DAF-16.?

A. is a gene that is only found in worms? B. can make people live longer?

C. has an effect on aging and immunity? D. has been quite familiar to scientists

75. What can be the best title of the passage?

A. Scientists Find Gene Linked to Aging B. Population Aging Faster than Expected

C. How to Make People Live Longer D. Gene Determines How Long We Live

71—75 BADCA?

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For hundreds of years, artists have used cartoons to criticize bad rulers or landowners. As early as the 19th century, people produced and read books of drawings. In many ways, they were similar to modern comics（漫画）. They contained stories of naughty children and playful animals. The owl and the elephant were usually wise animals, ready to give advice. The lion and tiger were brave. The fox and wolf were cunning, greedy and dangerous.

A century ago, an American newspaper published the first-color comic strip. It was so popular that sales of the newspaper, Morning Journal, increased quickly. Since then, newspapers throughout the world have included comic strips.

In modern time, comics are popular in China, Japan, the USA and almost everywhere. Not even video games or CD-ROMs have reduced their popularity. Names such as Snoopy, Woodstock and Garfield are well known in dozens of countries. The Peanuts comic strip appears in over 2,000 newspapers and in more than 25 languages.

Perhaps one day, you may like to create your own comic strip and become a millionaire. First, you must think of a good plot. It should be funny, exciting or interesting in some way. It should have plenty of action. Moreover, the language must be realistic and simple. The words should suit the characters in your story.

Furthermore, the characters in your story must be clear to readers. They should be obviously good or bad. In many comic strips—especially those showing crime of adventure—there should also be a hero or heroine. This will attract the reader to keep on reading the story.

1. Which of the following is NOT the name of a cartoon character?

A. Snoopy B. Garfield C. Peanuts D. Woodstock

2. We can know from the first paraphaph that rulers ________.

A. asked the artists to draw cartoons B. probably did not like cartoons about them.

C. often drew cartoons many years ago. D. used cartoons to give people advice.

3. According to the passage, what makes a popular and successful comic strip?

A. Good plot B. suitable language C. clear characters D. All of above

4. The underlined word “plot” is similar in meaning to ______.

A. places B. stories C. events D. characters

It is "one of the few bright spots in the Chinese economy," says Zeng Ming． He is talking about e-commerce． Mr Zeng, the chief strategy officer for Alibaba, a giant Chinese Internet firm, predicts that digital transactions on his firm's platforms will top l trillion yuan （$159 billion） this year-more than Amazon's and eBay's combined． That is a bold claim, but consider what happened on Singles Sunday．
Invented a few years ago by students and seized upon by digital marketers, this festival for lonely hearts falls annually on the llth day of the llth month （since l is the loneliest number）．It is like St Valentine's Day, only worse． Singletons shower each other with tender gifts: a barrage of pearls; a storm of sweets．
This November llth they spent a surprising 19 billion yuan on Alibaba's online platforms-a fourfold increase on a year ago, and more than double what Americans spent online last Cyber Monday （the Monday after Thanksgiving, when retailers urge Americans to shop online）． About 100m purchases were logged, accounting for 80% of the packages shipped that day． Couriers（怏递员） were buried in parcels．
So life is good for China's e-tailers, then? Not exactly． The number of digital marketers is increasing and online sales are booming． Consumers are enjoying lower prices, better service and more variety． The problem? The pressure on profits in Chinese e-commerce is worse than in America, reckons Elinor Leung of CLSA, a broker． "Almost no one makes money," she says．
The fiercest battles are being fought between online retailers and their bricks-and-mortar（实体的） rivals．Dangdang, a firm． that resembles Amazon,．and 360buy, another online retailer, have cut prices fiercely． Tencent, a cash-rich online giant known for its instant-messaging software, is splashing out to win market share． 360buy has also just raised $400m from investors to do the same． But it is unclear how much longer such firms can burn through capital．
【小题1】What's the best title of this passage?

A．The Ambition of Alibaba

B．Fierce Competition between Retailers

C．A Newly Sprung Festival for the Singles

D．Chinese Booming and Developing E-commerce

【小题2】According to Zeng Ming, this year Alibaba will ．

A．outweigh Amazon and eBay in worldwide influence

B．rank top among all the Internet firms

C．have more than 159 billion dollars' sale

D．create another sales miracle just like the one on Singles Day

【小题3】How many packages were shipped on November ll th from Alibaba's online platforms?

A．About 80 million．	B．About 100 million．
C．About 125 million．	D．About 180 million．

【小题4】What's the author's attitude towards online retailers in China?

A．Optimistic．	B．Concerned．
C．Sympathetic．	D．Indifferent．

A plane crash in Western Russian killed Polish President Lech Kaczynski and the other 96 political and military officials on board on April 10. The accident has led to huge national mourning in Poland. But it may provide an opportunity for reconciliation (和解) between Poland and Russia, countries that have a troubled relationship.

Many from the political elite were lost in the crash. Beside the president, the dead include the army chief of Staff, the head of National Security Bureau, the national bank president, the deputy foreign minister and other members of parliament.

The Polish delegation was heading to Russia to mark the 70 th anniversary of the Katyn Massacre (屠杀) when the accident occurred. In 1940, about 22,000 Polish soldiers, intellectuals, and officials captured after the Soviet Army invaded Poland in 1939, were killed secretly by Soviet police in the forest of Russia’s Katyn.

The Katyn Massacre had been a sensitive topic between the countries. The former Soviet Union always denied responsibility for the massacre. It was not until 1992 that Russian released archived documents about the killing.

Katyn is merely a short chapter in Poland and Russia’s long and troubled history. In the 18 th century, along with Prussia, (then an important part of Germany) and Austria. Russia participated in three carve – ups of Poland. In 1795, after the third carve – up, the country was erased from the map of Europe. It was in 1918 that Poland regained its independence. But in 1939, at the beginning of the World War II, it was invaded by Germany and the Soviet Union under a secret pact. After the war, Poland became a communist country with close ties to the Soviet Union.

In 1989, Poland switched to capitalism and pursued a pro – West position. The most recent tension between the two countries was in 2008. That year, Poland decided to have a US missile shield (导弹防御系统) on its soil, while neighboring Russia threatened to aim missiles at Poland.

But the plane crash has created a chance for reconciliation, with Russia sharing the sadness of Poland. Russia has declared April 12 a day of mourning for the victims. Flags flew at half – mast in Moscow. And earlier on April 7, Russia Prime Minister Vladimir Putin became the first Russian leader to mark the anniversary of the massacre.

“I think it should improve relations between the two countries, as Russians feel our grief,” said Radek Sikorski, Pland’s foreign minister.

66．Put the following events in order of time.

①The Katyn Massacre

②Poland switched to capitalism.

③Russia divided Poland with Austria and Prussia.

④Poland became a communist country.

⑤Poland was invaded by the Soviet Army.

A．③①④⑤② B．③⑤①④② C．①③⑤④② D．①⑤②④③

67．After the accident, which of the following did Russia do to share the sadness of Poland?

A．Flags were lowed to half – mast in the capital city of Russia.

B．Russia threatened to aim missiles at Poland.

C．Russia declared the day when the accident happened a day of mourning for the victims.

D．Vladimir Putin marked the anniversary of the massacre.

68．Which of the following is TRUE according to the passage?

A．The Katyn Massacre was the very beginning of Poland and Russia’s trouble relationship.

B．In 1939 about 22,000 Polish soldiers, intellectuals, and officials were killed by Soviet police in the forest of Russia’s Katyn.

C．Altogether 96 political and military officials were killed in the accident.

D．The relationship between Poland and Russia has not always been tense since the three carve – ups of Poland in the 18 th century.

69．It can be conclude from the article that .

A．the relationship between Poland and Russia will be even tenser than before

B．Poland will cancel its plan to mark the anniversary of the Katyn Massacre

C．no Russian leaders have marked the anniversary of the massacre before, though Russia released the truth in 1992.

D．Poland will forgive Russians, for they showed great sympathy after the accident.

70．What would be the best title for the passage?

A．The troubled relationship between Russia and Poland.

B．Poland and Russia united by tragedy.

C．The 70 th anniversary of the Katyn Massacre.

D．A plane crash killing Polish president.

第二部分：阅读理解（第一节20小题，第二节5小题；每小题2分，满分50分）

第一节：阅读下列短文, 从每题所给的四个选项 (A、B、C和D) 中, 选出最佳选项。

Being interested in a theme park since the time that I was a child, I have learned a thing or two over the years about packing for a day of fun. A trip to a theme park is always a adventure, but if you’re not prepared, your day of fun could easily turn into a tiny little nightmare(噩梦). It is important to pack long sleeved(带袖的) shirts or jackets for all members of your family. I is also a good idea to pack an extra pair of socks for each member of the family, especially the children, as those wonderful water rides can be fun, but wet socks that won’t dry aren’t so much fun.

You don’t want to pack too much food, as you will probably want to experience at least some of the food offered at the theme park of your choice(that’s half of the fun), but it’s always a good idea to bring some energy increasing snacks, such as fruit,trail mix,etc. This can mean the difference between spending a lot of money on snacks or a little money on one or two good meals.

Theme parks,while fun and exciting, can wear a person out,especially a child, so it’s important to keep hydrated(含水的). I would suggest packing one bottle of water per person, and possibly a couple of cans of soda or bottles of juice as well.

It’s a good idea to have at least two cell phones or even a set of “walkie-talkies” in the event that your family gets,separated in the park. It’s a good idea to give one of these things to the children and one to the parents and make sure that each of them knows how to use it. This could be the difference between trouble and a happy ending,

1.You should get well prepared before going to a theme park__________.

A. because the trip always costs much money

B.because there are always too many people in a theme park.

C. so as not to suffer from bad dreams when going back

D.so as to cut down your trip expenses and have more fun

2.From the passage, we can know_______________.

A.the author was fond of visiting theme parks when he was a child

B.wearing wet socks in a theme park will bring children much fun

C.it is terrible to have a taste of the food offered in a theme park.

D. we’d better bring enough food, clothing and water when going to a theme park

3.What does th underlined part”walkie-talkies” in the last paragraph probably refer to?

A. A kind of transportation tool B.A kind of musical instrument

C.A kind of CDplayer D.A kind of phone

4.How many types of things does the author advise us to pack for day trips to a theme park?

A Three B.Five C.Six D. Eight

Christmas bird – watching is popular in the U.S.A. When the holiday season comes, some Americans are likely to watch and count birds in the sky with great interest every day. This activity began in the early part of the last century. It has a one-hundred-year history. At that time, there was a so-called “holiday hunting” custom. In order to celebrate the holiday, the hunters went out to kill birds and beasts. By 1900, there were 27 bird lovers who decided to count birds instead of killing birds. Since then, Christmas bird-watching was held every year. It has been continued to the present.

There were 42000 people who took part in the bird-watching last Christmas, from December 16 the year before to January 3 next year. They were in the United States and Canada, central America, south America and the Caribbean, watching and counting birds in the sky. The whole viewing area was divided into 1600 points. Each birdwatcher was responsible for 25 meters, and was required to write down the types and quantities of birds within 24 hours.

A birdwatcher described what he had watched vividly in his diary—“ When I looked up, I saw a beautiful ‘landscape’ in the sky: Red-crowned cranes(丹顶鹤) were driving up in cunning wedges that split the air. They were so neatly arranged, coordinating their movements. I was excited and breathtaking. Interestingly, the “human” shape(人字行) always maintains 110° ” .

“Why do red-crowned cranes choose to use ‘human’ shape when flying in formation?” He continued, “In my opinion, there are four reasons: first, the ‘human’ shape can make red-crowned cranes use increasing air which is produced by each other’s wings when they are swinging in the sky. It can increase the glide time and save physical ability. Second, the ‘human’ shape will enhance communication among the birds. The orders and the relevant information issued by the lead bird can be conveyed to each member in this migratory group unimpeded, accurately, rapidly and conveniently. Third, such a formation will help to find the birds left behind because of feeling run down as fast as possible, so that the young, the weak, the sick birds can get everyone’s help and encouragement. Finally, the ‘human’ shape shows not only beauty but also unity. It can give enemies a deterrent.They will be terrified and did not dare to attack the birds.The migration security of the birds will be ensured.”

Environmental experts admired and evaluated Christmas bird-watching highly. They pointed out that it made perfect sense. On the one hand it could enhance the human awareness of environmental protection. On the other hand it could provide first-hand information on birds.

49．When did Christmas bird – watching begin?

A．Sometime during Christmas holiday. B．At the beginning of 20th century.

C．In the early 19 th century. D．Since there was Christmas Day

50．What do bird – watchers do when they are bird – watching?

A．They kill birds and beasts. B．They watch birds and beasts.

C．They watch and count birds. D．They look at the sky and write diaries.

51．The following are all reasons for red – crowned cranes flying in “human” shape except .

A．they can help each other and ensure their safety

B．they can communicate with each other in order to reduce tiredness.

C．they can make use of the air produced by each other’s wings.

D．they can look stronger in case they come across enemies

52．This passage consists of five paragraphs. Please arrange the five main ideas of the paragraphs in order of their appearance in the passage.

a. How the bird – watchers divided their watching task and what was done.

b. How Christmas bird – watching came into being.

c. Christmas bird – watching is of great importance environmentally and scientifically.

d. A Christmas bird – watcher watched and was amazed by red – crowned cranes.

e. Red – crowned cranes fly in “human” formation for quite good reasons.

A．a – b – c – d – e B．b – c – e – d – a C．b- a – d – e – c D．b – d – e – a – c

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