Whatever our differences as human beings are, we all think we’re more like the rest of the animal world than we realize. It is said that we share 40 per cent of our geneticstructure with the simple w 题目和参考答案——青夏教育精英家教网—

题目内容

Whatever our differences as human beings are, we all think we’re more like the rest of the animal world than we realize. It is said that we share 40 per cent of our genetic（遗传的）structure with the simple worm.

But that fact has helped Sir John Sulston win the 2002 Nobel Prize for Medicine. Sir John is the founder of the Sanger Institute in Cambridge, which was set up in 1992 to get further understanding of the human genome（染色体组）.

To help them do this, they turned to the worm. The nematode（线虫类的）worm is one of the earliest creatures on planet earth. It is less than one millimeter long, completely transparent and spends its entire life digging holes through sand. But it still has lots to say about human life, and what can be done to make it better.

What the worm told Sir John and his colleagues was that each of cells in the human body is programmed like a computer. They grow, develop and die according to a set of instructions that are coded in our genetic make-up.

Many of the diseases that humans suffer from happen when these instructions go wrong or are not obeyed. When the cell refuses to die but carries on growing instead, this leads to cancer. Heart attacks and diseases like AIDS cause more cell deaths than normal, increasing the damage they do to the body. Sir John was the first scientist to prove the existence of programmed cell death.

1．Sir John Sulston got a Nobel Prize for Medicine because he has .

A．found that human beings are similar to the worn

B．got the fact we share 40% of our genetic structure with the simple worm

C．found the computer which controls each of the cells in the human body

D．proved that cell death is programmed

2．People might be seriously ill if the cells in their body .

A．grow without being instructed

B．die regularly

C．fail to follow people’s instructions

D．develop in the human body

3．The underlined word “they” (paragraph 5) refers to .

A．cell death B．diseases C．instruction D．cells

4．What is the subject discussed in the text?

A．The theory of programmed cell deaths.

B．A great scientist—Sir John Sulston.

C．The programmed human life.

D．Dangerous diseases.

DABA

练习册系列答案

课堂新动态系列答案

一课一练一本通系列答案

初中历史与社会思想品德精讲精练系列答案

相关题目

It’s a goal for millions and millions of families every year——keep the Christmas spending within a certain amount, but can still afford the gifts that your loved ones will enjoy. Never has this concern been greater in recent years than right now. Even so, there are several things that you can do to help.

Hit the sales.

No one wants to get up at four o’clock in the morning and fight to get the best deal on Black Friday, and it’s surely very tough to pick up the courage and get out there in the cold for a good deal, but sometimes——it can be well worth. Many retailers(零售商) offer specials all through the day——and some even offer online Black Friday specials, so you may still be able to get a great deal on Black Friday.

Pay close attention to advertisements.

Once the Christmas shopping season is coming, retailers hungry for business will do just about whatever to get you in the store. Pay very close attention to weekly advertisements of sales among the major retailers and you may be lucky enough to find different prices for the same thing in different shops.

Shop online.

Some of us don’t like running from store to store in order to get the best price on the perfect gift, and some of us don’t like to go out in the cold at all——thankfully for us, we can do online shopping.

The world of online shopping lets people visit all the major retailers as well as some specialty stores that could only be found on the Internet. Customers can find exactly what they are looking for, at the best possible price without ever having to leave the house. With traditional Christmas shopping consumers are sometimes limited to what’s left in stock if they wait too long to get to a particular store.

The first paragraph implies that ______.

A. nowadays not many people can afford expensive gifts

B. recently many people don’t want to spend money on gifts

C. Christmas is a time to make our loved ones enjoy their gifts

D. Christmas is a time to make us feel free to buy our loved ones gifts

In the writer’s opinion, it is rewarding on Black Friday _____.

A. if the weather is not very cold B. if we don’t have to fight for the best deals

C. if we don’t have to get up early D. If we get what we want at a good price

The underlined word “specials” means_______.

A. some experts in shopping

B. certain things for especially low price

C. some kind of help for a certain customer

D. things that can only be found on Friday

We can have more choices _____.

A. on Black Friday B. in a particular store

C. on the Internet D. from retailers

Hit the sales.

Pay close attention to advertisements.

Shop online.

The first paragraph implies that ______.

A. nowadays not many people can afford expensive gifts

B. recently many people don’t want to spend money on gifts

C. Christmas is a time to make our loved ones enjoy their gifts

D. Christmas is a time to make us feel free to buy our loved ones gifts

In the writer’s opinion, it is rewarding on Black Friday _____.

A. if the weather is not very cold B. if we don’t have to fight for the best deals

C. if we don’t have to get up early D. If we get what we want at a good price

The underlined word “specials” means_______.

A. some experts in shopping B. certain things for especially low price

C. some kind of help for a certain customer D. things that can only be found on Friday

We can have more choices _____.

A. on Black Friday B. in a particular store

C. on the Internet D. from retailers

In this passage the writer means ______.

A. to tell us the best way to do shopping

B. to attract more readers to do wise shopping

C. to show us how hard it is to do Christmas shopping

D. to give us advice on how to get a good deal at Christmas time

Having driven almost thirty hours, I decided to stay in South Carolina for a few days. The next morning, I purchased a three-day fishing license and bait (饵料) before heading to the lake.

Opening my trunk, I carefully took out my fishing gear (用具), put it on the lake’s edge, baited up and began to fish.

“Good morning,” said someone, walking up from behind me.

Turning around, I saw a game warden (猎场管理员) with a clip-board.

“Good morning,” I said, nodding my head.

“Catch any fish?” he asked.

“No sir, just relaxing and killing time.”

“Can I see your fishing license?”

I handed him the license I had purchased at the bait shop.

“Can I see your driver’s license, too?” he requested.

“I see the name on the driver’s license is spelled Kiser and the name on the fishing license is Kaiser,” said the warden.

“The gentleman at the bait shop must have written it wrong,” I told him.

“Well, I’m afraid I’ll have to write you up for fishing with an invalid license and take away your fishing gear.”

“You’ve got to be kidding,” I responded, with a surprised look on my face.

Sure enough I was written up and my fishing gear taken away. I was told that I would have to pay a fine and that my stuff would be sold at auction（拍卖）.

I stood there almost in tears as he drove away. Those rods and reels were very special to me. I had used them over twenty years, fishing with my friends, who were now all dead.

After returning home in Georgia, I telephoned South Carolina trying to explain the situation, but no

one would listen. I was told that the Department of Fish and Game had a “zero tolerance” for fishing and hunting violations. Finally, in tears I paid the fine and gave up the fight.

Nine months later, I received a letter. I had no idea who it was from as there was no return address. On a plain piece of notebook paper was written “Auction for the Department of Fish and Game held this Saturday at 11:00 am.”

On Saturday, at six in the morning I headed to South Carolina. By ten o’clock I had found the auction. There were numerous boats and piles upon piles of fishing equipment. All at once, there it was—my wonderful stuff all thrown in a pile as if it was worth nothing.

As the auction began I took my seat. In my wallet was twenty-seven dollars. For more than an hour I waited for my property to be brought to the auction block.

“We have three rods and reels here. I guess we will sell this as a unit,” said the auctioneer.

“50 dollars,” yelled someone in the crowd.

“51 dollars,” yelled another man.

I rose from my seat and walked out of the auction.

“66 dollars,” I heard as the bidding continued.

“100 dollars,” came another bid. The auction became silent.

“100 dollars once, 100 dollars twice, 100 dollars three times. Sold for 100 dollars,” went the auctioneer.

I walked to my truck, got in and just sat there. Suddenly I heard something hit the side of my truck. Turning around, I saw the back of a man putting my three rods and reels into my truck. It was the same game warden who wrote me the ticket almost a year ago!

As I got out of the truck he stuck out his hand and said, “I wasn’t wrong. It’s the law that is wrong.”

I shook his hand, thanked him and drove away. I cried as I crossed the South Carolina Georgia state line.

Who wrote a letter to the writer telling him about the auction?

A. The Department of Fish and Game. B. The game warden.

C. A person unmentioned in the passage. D. The auction organizers.

Why did the writer walk out of the auction while it was going on?

A. He realized he was unable to get back his fishing gear.

B. He was too nervous to stay inside till the auction ended.

C. He couldn’t bear hearing people selling his fishing gear.

D. He knew the game warden was waiting for him outside.

What did the game warden mean by saying “It’s the law that is wrong”?

A. It didn’t make any sense to prohibit people from fishing freely in South Carolina.

B. The writer did break the law by fishing with an invalid license whatever the reason.

C. The writer should have been allowed a chance to explain and get his things back.

D. The auction should not have been held to sell the boats and fishing equipment.

Hello. It’s one of the first words we learn as babies, yet it’s one of the last ones we think to use as adults. That’s unfortunate, b 48 saying hello is more than just saying hello—it is recognition of another’s worth. How might the world change—how might we change—if we mastered this word? To find o 49 , I spent one month saying hello to every person I met. Here’s what I’ve learned. It can boost （促进） productivity. In one of the few studies ever done on this subject, Allan Allday, a 50 assistant professor of special education at Oklahoma State University, had middle school teachers greet their students individually each morning. This exchange of greetings raised the kids’ productivity. School went from impersonal to p 51 , and that resulted in more class participation and better grades.

Environments influence friendliness, One study found that people in the city were more likely to kiss one hand with a stranger than those in the countryside. And researchers say，pleasure environments generally encourage more smiles and hellos t 52 unpleasant ones. My experience was similarly. Whatever the reason, my urban hellos were answered far l 53 often than my rural one. Similarly, people in vacation spots, l 54 the Jersey Shore, were far friendlier than those hurrying work downtown.

It’s a form of universal health insurance. It’s impossible to say hello w 55 smiling. And smiling has been shown to lower blood pressure, relieve stress and boost happiness. Apparently, a smile creates a similar effect in the recipient （接受者）。

Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new ___36____. He has proved that everyone has a daily energy cycle.

During the hours when you labour through your work, you __37___ say that you’re “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is ___38____. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered __39___ this is so , but it leads to such familiar monologues （自言自语）__40___ “Get up , John ! You’ll be late for work again!” The ___41___ explanation to the trouble is that John is at his temperature—and —energy peak in the evening. Much family quarrelling ___42___ when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.

You can’t change your ___43___, but you can make your life ___44___ it better. Habit can help. Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late ___45___. Counteract （打乱）your cycle to some extent by ___46___ staying up later than you want to . If your energy is ___47___ in the morning but you have an important job to do early in the day, ___48___ before your usual hour. This won’t change your cycle, but you’ll get up steam(打起精神) and work better ___49___.

Get off to a slow start ___50___ saves your energy. Get up with a yawn （呵欠）and ___51___ . Sit on the edge of the bed a minute before ___52____ on the floor. Avoid the ___53___ search for clean clothes by laying them out ___54___. Whenever possible , do routine （常规的）work in the afternoon and save tasks ___55____ more energy for your sharper hours .

1. A. impression B. explanation C. exploration D. translation

2. A. must B. should C. can D. may

3.A. at its bottom B. at its beginning C. at its end D. at its peak

4.A. why B. that C. whether D. whatever

5.A. as B. such as C. which D. like

6.A. steady B. occasional C. surprised D. possible

7.A. starts B. comes back C. ends D. turns around

8.A. life attitude B. energy cycle C. time table D. alarm o’clock

9. A. to do B. change C. fit D. to renew

10.A. anywhere B. no way C. anyway D. somewhere

11.A. sensitively B. especially C. carefully D. habitually

12.A. low B. high C. old D. new

13.A. go up B. rise C. lift D. raise

14. A. in your high spirit B. at the right time

C. at your low point D. in the same way

15.A. which B. whichever C. what D. whatever

16.A. express B. attend C. open D. stretch

17.A. putting your feet B. setting your foot

C. laying down your foot D. lying your feet

18.A. tired B. troublesome C. immediate D. dangerous

19.A. yesterday B. last night C. the night ago D. the night before

20.A. suggesting B. demanding C. requiring D. persuading

试题分类