It is easy for us to tell who our family members are, but do plants recognize their own family? Some do, scientists say, according to a report by Science News in early 2010.
Guillermo P. Murphy and Susan Dudley are two plant scientists from McMaster University in Hamilton, Canada. They did a few experiments with Jewelweeds, a kind of flower that grows in wet, shady spots. They found that the flowers seem to know their own flower family. In their experiments, Murphy and Dudley planted jewelweeds in pots with either siblings (同屬) or strangers.
When jewelweeds were planted in pots with strangers, the plants started to grow more leaves than if they had been planted alone. This response suggests that plants are competing with strangers for sunlight, since a plant with more leaves can receive more light and make more food. Jewelweeds normally grow in the shade, where sunlight is scarce.
When jewelweed seedlings were planted with siblings, they grew a few more branches than they normally would if they were alone – but they did not start growing lots of extra leaves. This behavior suggests the plants are more likely to share resources, rather than compete.
According to the Science News report, Jewelweeds are not the first plants that plant scientists have studied for family recognition. In 2007, Dudley and her team studied the Great Lakes sea rocket, a plant that grows on the beach – where it may be hard to get fresh water. In that experiment, the scientists observed that when sea rockets were planted with siblings, they tolerated each other. But when they were planted with strangers, the sea rockets reacted by working extra hard to grow lots of roots.
Dudley says this behavior makes sense because sea rockets, on the beach, get plenty of sun but struggle for water – so when they’re threatened, they compete for water. Jewelweeds have plenty of water but have to compete for sunshine, so they grow more leaves.
52. When the McMaster University scientists experimented with Jewelweeds, they __________.
A. planted Jewelweeds alone
B. separated jewelweeds from their siblings
C. planted Jewelweeds in an unusual environment
D. grew jewelweeds together with either family or strangers
53. Which of the following shows that Jewelweeds compete with others?
A. Jewelweeds grow extra leaves.
B. Jewelweeds grow more branches as well as extra leaves.
C. Jewelweeds grow more branches rather than more leaves.
D. Jewelweeds grow taller than usual.
54. The underlined word “scarce” in paragraph 3 means _____________.
A. dark B. not enough C. not available D. mild
55. From the text, we can conclude that the Great Lakes sea rockets ____________.
A. prove the same point as Jewelweeds B. compete with strangers for sunlight
C. cannot recognize their siblings D. grow more leaves when planted with strangers
56. What is the article mainly about?
A. New discoveries about plants. B. How plants compete with each other.
C. Family recognition among plants. D. Jewelweeds and the Great Lakes sea rockets.
科目：高中英語 來源：2014屆江蘇省高二12月月考英語試卷（解析版） 題型：閱讀理解
Researchers have found more evidence that suggests a relationship between races and rates of lung cancer among smokers. A new study shows that black people and Native Hawaiians are more likely to develop lung cancer from smoking. It compared their risk to whites, Japanese-Americans and Latinos.
Researchers at the University of Southern California and the University of Hawaii did the new study. The New England Journal of Medicine published the findings. The eight-year research studied more than 180,000 people. They included present and former smokers and people who never smoked. Almost 2,000 people in the study developed lung cancer.
Researchers say genetics might help explain the racial and ethnic differences. There could be differences in how people's bodies react to smoke. But environmental influences, including the way people smoke, could also make a difference.
African-Americans and Latinos in the study are reported smoking the fewest cigarettes per day. Whites are the heaviest smokers. But the scientists point out that blacks have been reported to breathe cigarette smoke more deeply than white smokers. This could fill their lungs with more of the chemicals in tobacco that cause cancer.
Scientists know that some diseases effect different groups differently. And some drug companies have begun to develop racially targeted medicines. Last June, the United States Food and Drug Administration approved a drug designed to treat heart failure in black patients. The name is BiDil. The agency called it "a step toward the promise of personalized medicine."
1.Which of the following orders is from higher to lower risk of having lung cancer?
A．Whites—Native Hawaiians
B．Africans—Americans—Latinos
C．Asians—Native Hawaiians
D．Africans—Americans—Native Hawaiians
2.Researchers agree that it is _____ that may probably determine black people’s risk of lung cancer.
A．the larger amount of smoking than white people
B．the living style or habit of the blacks
C．the depth of cigarette smoke into their lungs
D．the physical strength to react to cigarette smoke
3.People in the new study are made up of _____.
A．heavy smokers in America B．the black and white people
C．the Asians and Hawaiians D．smokers and non-smokers
4.The production of BiDil referred to in the last paragraph is to _____.
A．explain different races react to some diseases differently
B．tell the readers that racial differences exist in smokers
C．show a big step people have taken in the medicine area
D．support the idea that it is easy for blacks to have cancers
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科目：高中英語 來源：2011湖北天門市高考模擬試題二 題型：閱讀理解
Whether I’m looking for a good chat with some old Mends or a quiet place to meet a colleague, the pub will be the place I always choose.
I could, of course, go to a bar. But a pub, I always find, is far more comfortable and has a more relaxed atmosphere.
Many people in the UK also have a favorite pub at the end of the road where they live or nearby to where they work. I can almost always guarantee that I’ll bump into someone I know at my “local”, as we British call our nearest pub.
In fact, many people from the UK say that the pub is a cornerstone (基礎) of British life. Coming together over a drink, usually of beer, is generally considered the best way to catch up with friends. For those who are a little reserved (內向的), as the British sometimes are, it’s the best way to open up and get chatting.
However, this habit is slowly changing among some British people. According to a survey completed in August by UK trade magazine The Publican, eating, rather than drinking, has become the main source of income for our 52,000 pubs.
The gastropub (美食酒吧), with its greater emphasis on food, is primarily responsible. All over the country, this more expensive type of pub has been springing up, providing a place for more formal meetings with business partners. Wine is often drunk instead of the traditional beer.
But not everyone’s happy. Many people hate the fact that some local pubs are closing because new gastropubs are proving more profitable. “Beer sales are sinking and many pubs are struggling to survive,” Rob Haward, of the British Beer and Pub Association, told UK newspaper The Daily Mail.
For my part, I’m going to do all I can to keep the local British pub alive. It will be the first place I visit when I go back home.
1.. The article is mainly about .
A. the British pub losing popularity B. the author’s love of pubs
C. how the British socialize D. the local British pub
2.. Many British people say that the pub is a cornerstone of British life because .
A. it is nearby and convenient
B. it is a great place for meeting friends
C. it is far more comfortable than a bar to have a drink
D. it is easy to bump into people they know in a pub ,
3.. From the text, we can conclude that gastropubs .
A. will replace the local pubs
B. attach more importance to drinks
C. are somewhere between a restaurant and a bar
D. attract beer lovers as well as wine lovers
4.. Which of the following is TRUE according to the article?
A. The author is in favor of gastropubs.
B. Wine is thought to show one’s class and taste.
C. British people do not go to pubs as often as before.
D. Local pubs are being seriously affected by gastropubs.
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科目：高中英語 來源：2013屆甘肅省高二第一次月考英語試題 題型：閱讀理解
The story begins with fishing.
Once a boy and his father went fishing before bass (a kind of special fish) season opened. They were fishing early in the evening, catching other fish with worms. Then the boy tied on a small silver lure (魚餌) and put it into the lake. Suddenly he felt that something very big pulling on the lure. His father watched with admiration as the boy skillfully brought the fish beside the bank. Finally he lifted the tired fish from the water. It was the largest one he had ever seen, but it was a bass(the special fish).
The boy and his father looked at the big fish. The father lit a match and looked at his watch. It was 10 pm – two hours before the bass season opened. He looked at the fish, then at the boy. “You’ll have to put it back, son,” he said.
“Dad!” cried the boy, “There will be other fish,” said his father. “Not as big as this one,” cried the boy. He looked around the lake. No other fishermen or boats were in sight in the moonlight. He looked again at his father.
Even though no one had seen them, nor could anyone ever know what time he had caught the fish, the boy could tell from his father’s voice that the decision couldn’t be changed. He threw the huge bass into the black water. The big fish disappeared. The boy thought that he would never again see such a big fish.
That was 34 years ago. Today the boy is a successful architect in New York City. He often takes his own son and daughters to fish at the same place.
And he was right. He has never again caught such a large fish as the one he got that night long ago. But he does see that same fish … again and again … every time he has an ethical decision to make. For, as his father had taught him, ethics (倫理道德)are simple matters of right and wrong. It is only the practice of ethics that is difficult.
1. What happened when the big fish turned out to be a bass?
A. The boy threw the bass back into the water willingly.
B. The boy and his father discussed what to do with the big fish.
C. The father lit a match in order to check the time.
D. They worried other fishermen may discover what they had done.
2.From the text we know that the father _____.
A. disliked the huge fish B. was firm and stubborn
C. didn’t love his son D. always disagreed with his son
3.The successful architect went fishing with his children at the same place because _____.
A. they might catch a big fish there
B. he was taught a moral lesson there
C. it was a most popular fishing spot
D. their children enjoyed fishing there
4.What does the story imply?
A. An ethical decision is always easy to make.
B. It is easy to say something, but difficult to do.
C. It’s hard to tell right from wrong sometimes
D. Fishing can help one to make right decisions
5.What kind of the person the father is?
A. kind B. honest C. optimistic D. satisfied
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科目：高中英語 來源：2010年遼寧省高一上學期10月月考英語卷 題型：單項填空
---Shall we go there by boat for a change?
---______.
|
A．You say |
B．It is up to you |
C．It is hard to say |
D．It is easy to tell |
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科目：高中英語 來源：2010年遼寧省大連市高一下學期期末考試英語卷 題型：閱讀理解
根據短文內容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。
71 Many Americans make a promise that they will find a new or better job in the new year. And many businesses decide to fill empty positions this time of year. There are many ways to find a job. It can be as easy as walking into a neighborhood store to look at its announcement board. Local stores often have areas where people can put small signs telling what kind of service they need or can provide. 72 Or, job searchers can look in the newspaper. Local newspapers have employment announcements placed by companies seeking workers. 73 Now, people in 450 cities around the world are using the Web to meet people or find a job. It is estimated that two million new job listings are offered each month. 74 It is because almost every one of them has the Career Exploration center for people to get help in finding a job.
Of course, looking for a job requires knowing what kind of work you want to do. For example, there is a book called What Color is Your Parachhute? by Richard Bolles. This book has been helping people choose a career since it was first published in 1970. 75 They can help people find jobs by first helping them understand their strengths, goals and interests. And then they provide them with methods and resources to help people find the right job.
A. It is easy to find a good job at that time.
B. Such services include caring for children or cleaning houses.
C. Also, some experts help people find jobs.
D. Another popular tool for finding jobs is the Internet.
E. January is the top month for getting a new job.
F. Jobs can often be offered to men.
G. Besides, people can find a job through a college or university.
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