We each have a unique genetic (基因的,遗传的) make-up. Every cell of your body has the same set of about 100,000 separate genes made of DNA. These are the instructions for producing a person. Genes decide everything from the colour of your skin to the way your brain works. You have one of several billion binations of DNA which e from the random(随机的,任意的) mixing of your parents’ genes. Except for identical twins (同卵双胞胎), no one has the same bination as another person. You are unique! You are unique in another way too: in the way you are raised and all the experiences you have from before birth to adult life. These experiences influence you, your behaviour and attitudes, and the choices you make.
But are genes or life experiences more important in shaping your appearance and personality? Scientists are studying twins to find out. One set of twins occurs every 70 births---some are identical and others are non-identical twins. Identical twins are special because they share exactly the same genes and often the same environment. Non-identical twins are more like ordinary brothers and sisters.
Some identical twins have been adopted and brought up in different homes. With identical genes but a different home environment, scientists can study twins to see how much a particular feature depends on the genes we inherit. For example, we know that eye problems, like short-sightedness, are mostly genetic. But resistance to pain is largely dependent on experiences. Genes also influence our eating habits. Identical twins brought up apart often like to eat at the same time of day and feel full after eating the same amount. Non-identical twins in similar circumstances have more varied eating habits. Identical twins are also more likely to follow the same patterns for marriage and divorce than non-identical twins.
Scientists are trying to identify the different genes that influence our behaviour. Some people are thrill-seekers and get into risk-taking and adventurous activities. They take up extreme sports like bungee jumping and possibly take drugs. Scientists have discovered a gene which affects this.
We could ask, “Are our lives determined by our genes or our upbringing?” Scientists are learning more all the time, but it is certainly true that both are important in making us who we are.
1.What is the main idea of the first paragraph?
A. We cannot easily change our physical appearance.
B. How we turn out depends on our parents’ genes.
C. Everyone has a physical double somewhere in the world.
D. Both our genes and our experiences make us who we are.
2.Why are scientists studying twins?
A. To find out how many twins are born every year.
B. To discover what shapes us as individuals.
C. To pare differences between twins.
D. To study brother-and-sister relationships.
3.According to the passage, __________.
A. one in 70 twins are genetically identical
B. non-identical twins are usually not of the same sex
C. twins separated at birth behave exactly the same
D. identical twins are genetically the same
4.Which of the following is most affected by experience according the passage?
A. Eating habits. B. Eye-sight.
C. Pain resistance. D. Marriage patterns.
5.What does the underlined “this” in Paragraph 4 refer to?
A. Our love of sport.
B. Our attitude to risk-taking.
C. Our skill at bungee jumping.
D. Our ability to take drugs.
科目:高中英语 来源:2014-2015学年辽宁师大附中高三上学期10月模块考试英语试卷(解析版) 题型:完形填空
第二部分 完形填空(共20小题;每小题1.5分,满分30分)
阅读下面短文,从短文后各题所给的四个选项(A、B, C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
When I was 8, a gentleman came to my orphanage(孤儿院)and taught us how to do woodworking projects.
I remember my first project—a small table. I was so ____ of it that I looked upon it as if I had created a(an) _____ . It was absolutely beautiful and it had taken me six weeks to ______it. I could hardly wait to give it to Mother Winters as a _____. She was the head mistress of our orphanage, who was always _____ with us.
As the tables were not dry from the clear coating, the man told us to wait a few days before taking them to our dormitories. But I was just so ____and happy that I couldn’t wait. I dashed out like a ______ , carrying my table, smiling from ear to ear.
When I reached the dormitory I placed the little table beside my bed. I was _____it when Mother Winters entered. She walked over to the table. Running her hand _____ it, she noticed that it was still wet.
“Were you ______to bring this home?” she asked.
“No, ma’am,” I _____ with my head down.
She ordered me to throw the table out and so I did. After she left, I immediately opened the door to get it back. There was _____stuck all over. I brushed and cried, but it would not come off.
I hid the table in my closet and never _____it. A year later while cleaning up, I gave the table to Mother Henderson, my houseparent(宿管员), thinking that she would _____it away.
Thirty years later at a reunion, I ____that Mother Henderson was living nearby, so I drove up to see her. We talked cheerfully for long. As I was about to leave, she asked me to come down to her_____ to get something important. I followed her _____ into a dark corner. She picked something up. _____she turned around, I could see that she was holding a little table.
Mother Henderson kept the little table that I had given up for lost so long ago.
Today, I look at that table with bittersweet memories but full of _____to Mother Henderson, who kept it for a young orphan who tried very hard to _____ .
1.A. tired B. ashamed C. proud D. aware
2.A. award B. wonder C. record D. product
3.A. design B. invent C. paint D. complete
4.A. gift B. reward C. prize D. souvenir
5.A. satisfied B. strict C. patient D. angry
6.A. upset B. amazed C. confident D. excited
7.A. thief B. hero C. sword D. flash
8.A. drying B. observing C. admiring D. hiding
9.A. into B. across C. above D. after
10.A. supposed B. embarrassed C. encouraged D. determined
11.A. agreed B. sighed C. whispered D. argued
12.A. dirt B. glue C. paint D. wood
13.A. removed B. touched C. shook D. split
14.A. put B. give C. take D. throw
15.A. learned B. expected C. remembered D. recommended
16.A. bathroom B. balcony C. basement D. bedroom
17.A. curiously B. unwillingly C. doubtfully D. worriedly
18.A. Before B. Since C. As D. Until
19.A. admiration B. gratitude C. sympathy D. regret
20.A. adapt B. study C. perform D. please
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科目:高中英语 来源:2016届上海宝山区吴淞中学高一上第一次月考英语试卷(解析版) 题型:阅读理解
Every time you go to the supermarket you come away with your purchases packed in plastic bags. But wouldn’t it be kinder to the environment if you asked for paper bags instead?
The answer is not as easy as it might seem. Environmentalists say there are drawbacks to using both plastic bags and paper bags.
80 percent of groceries in the US are packed in plastic bags and the numbers are becoming huge. Consumers use between 500 billion and 1 trillion plastic bags per year worldwide.
Some experts believe that all these bags harm the environment. Plastic takes hundreds of years to break down and, as it does so, poisonous materials are released into the water and soil.
Further damage is caused if plastic bags enter the sea. For example, endangered sea turtles cannot tell the bags from jellyfish, their main source of food, and often choke on them.
However, this kind of bag does have its advantages.
Paper bags use more energy and create more waste than plastic bags. Plastic bags require 40 percent less energy to produce and cause 70 percent less air pollution. They also release as much as 94 percent less waste into the water than paper ones do.
But paper bags do break down more quickly than plastic bags. They don’t endanger wildlife, either.
So what should we do? One possible solution would be to use biodegradable plastic bags. “Biodegradable” means that the bags break down naturally just like a piece of banana peel when it is left outside.
But until biodegradable technology improves, it might be easier to pack things you buy in reusable cloth bags.
1.Compared to paper bags, plastic bags ______.
A. produce 6 percent more waste
B. can be made biodegradable more easily
C. can be used as a source of food
D. save 40 percent of the energy
2.By saying “The answer is not as easy as it might seem,” (in paragraph 2) the writer means _____.
A. biodegradable plastic bags can compete with paper
B. paper bags seem to be kind to environment
C. it’s difficult to say whether plastic or paper bags are better for the environment
3.What does the author suggest people use at the present time?
A. Paper bags
B. Plastic bags
C. Biodegradable plastic bags.
D. Cloth bags.
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科目:高中英语 来源:2016届陕西西安市高一下学期期末考试英语试卷(解析版) 题型:单项填空
Either the judge or the lawyers ______ wrong on the case at that moment.
A. is B. are C. were D. was
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科目:高中英语 来源:2016届陕西西安市高一下学期期末考试英语试卷(解析版) 题型:单项填空
Our government’s plan to fight against air pollution will focus on _____ information and handling PM2.5.
A. expressing B. representing
C. gathering D. acknowledging
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科目:高中英语 来源:2016届安徽师大附中高一下学期期中考试英语试卷(解析版) 题型:单项填空
When I met him the other day,it was the first time we ______ each other since we graduated from school.
A. saw B. have seen
C. were seeing D. had seen
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科目:高中英语 来源:2016届安徽师大附中高一下学期期中考试英语试卷(解析版) 题型:单项填空
______ is generally accepted, economic growth is determined by the smooth development of production.
A. What B. That C. It D.As
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科目:高中英语 来源:2015届安徽师大附中高二下学期期中考试英语试卷(解析版) 题型:单项填空
The good thing about children is that they _______ very easily to new environments.
A. adapt B. appeal C. attach D. apply
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科目:高中英语 来源:2014-2015学年辽宁沈阳东北育才学校高三上第一次模拟英语试卷(解析版) 题型:语法填空
第二节(共10小题;每小题1.5分,满分15分)
阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。
Snake dishes have become popular1. recent years. Snake meat in various flavors (风味) is often seen in restaurant ads. Eating snake seems to be now in vogue(盛行), and if you haven’t eaten snake yet, you 2.(consider) “out of date”. But I wonder3. all the trends are worth following.
Some people may defend themselves _4. saying that snake meat is nutritious. But these people don’t realize that many parasites(寄生虫),5. do harm to our health, are found inside snakes.
According 6. a survey, about 1000 tons of snakes are eaten every year in China and sometimes as 7. as 10 tons of snakes are served on dinner tables in Shenzhen in a single day!
These figures warns us that if no action is taken, 8. number of snakes will drop and make an increase in mice and worms population, which will 9.in a decrease(减产) of crop output. Who will see such tragedy happen?
So let’s start not to eat snakes any more because “to protect the snake is to protect 10.”
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