Health experts have long worried about the increasing rate of obesity in kids. It’s an important concern: Being weight or obese during childhood can lead to serious problems normally seen in adults, such as diabetes and high blood pressure. Poor diets and a lack of exercise are usually the causes. But would you ever have imagined there might be a connection between the bacteria that lived in your guts （内脏）when you were a baby and the chance that you would become overweight?
Scientists in Finland recently found just such a link. In a recent study, they showed that overweight kids had different species of bacteria living in their guts.
You probably think of bacteria only as germs that can make you sick. While it’s true that some bacteria can make people ill, your body actually depends on some types of bacteria to help you digest food and extract nutrients from it. These “good” bacteria live in your guts, where they process the food you eat.
Human babies get these bacterial helpers from their moms. When a baby is born, some of the bacteria in the mother move into the baby’s body. Growing babies get additional “good” bacteria from the milk their mothers produce. And it turns out the bacteria might play an important role in regulating weight just six years later.
So how could these bacteria affect weight? The researchers still haven’t tested that question, but future tests might lead to an answer.
The “link” in Paragraph 2 refers to the relationship between _______.
A. bacteria and the chance of being overweight
B. obesity and diabetes
C. diets and the chance of being overweight
D. bacteria and exercise
Which of the following is NOT the function of “good” bacteria?
A. Helping to digest food.
B. Helping to take nutrients from food.
C. Helping to regulate weight.
D. Making a person ill.
The purpose of writing this passage is to _______.
A. introduce the role of bacteria in children’s weight
B. analyze the influence of obesity on kids
C. give advice on how to lose weight quickly
D. explain the function of bacteria in foods
天天练口算系列答案科目：高中英语 来源： 题型：
I admired my classmate Lisa very much. ____ her prettiness, she was smart and helpful.
A. Except for B. But for C. Apart from D. In spite of
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科目：高中英语 来源： 题型：
Professor White has written some short stories, but he is＿＿＿known for his plays．
A．the best B．more C．better D．the most
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科目：高中英语 来源： 题型：
The traffic in our city is already good and it ＿＿＿even better.
A.gets B.got C.has got D.is getting
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科目：高中英语 来源： 题型：阅读理解
America is a country on the move. In unheard?of numbers, people of all ages are exercising their way to better health. According to the latest figures, 4 percent of American adults exercise regularly-up 12 percent from just two years ago and more than double the figure of 25 years ago. Even non-exercisers believe they would be more attractive and confident if they were more active.
It is hard not to get the message. The virtues of physical fitness are shown on magazine covers, postage stamps, and television ads of everything from beauty soaps to travel books. Exercise as a part of daily life did not catch on until the late 195s when research by military doctors began to show the health benefits of doing regular physical exercises. Growing publicity (宣传) for races held in American cities helped fuel a strong interest in the ancient sport of running. Although running has leveled off in recent years as Americans have discovered equally rewarding-and sometimes safer-forms of exercise, such as walking and swimming, running remains the most popular form of exercise.
As the popularity of exercise continues to mount, so does scientific evidence of its health benefits. The key to fitness is exercising the major muscle groups vigorously (强有力地) enough to approximately double the heart rate and keep it doubled for 20 to 30 minutes at a time. Doing such physical exercises three times or more a week will produce considerable improvements in physical health in about three months.
5.It can be learnt from the passage that the health benefits of exercise .
A.are to be further studied B.are self?evident
C.are yet to be proved D.are supported by scientific evidence
6.A growing interest in sports developed after___________ .
A.an increasing number of races were held in American cities
B.research showed their health benefits
C.scientific evidence of health benefits was shown on TV ads
D.people got the message from magazine covers and postage stamps
7.Which of the following would be the best title for the passage?
A.Exercise-The Road to Health B.Scientific Evidence of Health Benefits
C.Different Forms of Exercise D.Running-A Popular Form of Sport
8.Which of the following is closest in meaning to the phrase “leveled off” in the paragraph 2?
A.“reached its lowest level in popularity” B.“stopped being popular”
C.“stopped increasing in popularity” D.“become very popular”
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科目：高中英语 来源： 题型：阅读理解
American schools do not have separate classes for boys and girls. If boys want to cook or to sew, they can learn these things in classes that are no longer just for girls. If girls want to repair cars, they can now learn this in school. Most students like to have boys and girls on the same baseball team.
Many boys and girls dress alike in school. They were blue jeans and sport shirts. Some have long hair and some have short hair. Sometimes a boy has longer hair than a girl.
Even the language is different. Students learn to say fire fighter instead of fireman, police officer instead of policeman, and letter carrier instead of mailman. A person does not need to be a man to fight a fire or to deliver the mail.
Most people think that these changes are good. They give all people an equal chance to be happy and to do what they want to do with their lives. Fathers like to tell their sons that they can grow up to be president. Today, mothers can tell the same things to there daughters.
Students in American schools learn to say police officer instead of policeman because____.
A. boys don’t like to be a policeman
B. girls don’t like to be a policeman
C. police officer sounds better than policeman
D. a police officer can be a policeman or policwoman
We may infer from the text that in the past in American schools____.
A. there were many differences between boys and girls
B. boys could do everything but girls couldn’t
C. boys and girls were the same in everything
D. girls only learned how to sew and cook
The underlined word “ They” in the last paragraph refers to ____.
A. American schools B. these changes C. most people D. American students
What does “mailman” mean?
A. Milkman B. Postman C. Writer D. Reporter
What do most people think of the changes in American schools?
A. Surprising B. Strange C. Good D. Bad
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科目：高中英语 来源： 题型：阅读理解
At a certain time in our lives we consider every place as the possible sites(地点) for a house. I have thus searched the country within a dozen miles of where I live. In imagination I have bought all the farms, one after another, and I knew their prices.
The nearest thing that I came to actual ownership was when I bought the Hollowell place. But before the owner completed the sale with me, his wife changed her mind and wished to keep it, and he offered me additional dollars to return the farm to him. However, I let him keep the additional dollars and sold him the farm for just what I gave for it.
The real attractiong of the Hollowell farm to me were its position, being about two miles from the village, half a mile from the nearest neighbor, bounded(相邻) on one side by the river, and separated from the highway by a wide field. The poor condition fo the house and fences showed that it hadn’t been used for some time. I remembered from my earliest trip up the river that the house used to be hidden behind a forest area, and I was in a hurry to buy it before the owner finished getting out some rocks, cutting down the apples trees, and clearing away some young trees which had grown up in the fields. I wanted to buy it before he made any more of his improvements. But it turned out as I have said.
I was not really troubled by the loss. I had always had a garden, but I don’t thing I was ready for a large farm. I believe that as long as possible it is better to live free and uncommitted (无牵挂的). It makes but little difference whether you own a farm or not.
What do we know about the author?
A. He wanted to buy the oldest farm near where he lived.
B. He made a study of many farms before buying.
C. He made money by buying and selling farms.
D. He had the money to buy the best farm in the country.
Why did the author decide to buy the Hollowell place?
A. It was of good market value.
B. It was next to the highway.
C. It was in a good position.
D. It was behind a nice garden.
Why did the author want to buy the farm in a hurry?
A. He was afraid the owner might changes his mind.
B. He hoped to enlarge the forest on the farm.
C. He wanted to keep the farm as it was.
D. He was eager to become a farm owner.
The underlined words “the loss” in the last paragraph refer to ___.
A. the money the author lost in buying the farm
B. the sale of the garden in the Hollowell place
C. the removal of the trees around the house
D. the failure to possess the Hollowell place
What does the author believe as important in life?
A. To own a farm B. To satisfy his needs
C. To be free from worries D. To live in the countryside
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科目：高中英语 来源： 题型：阅读理解
Tests administered（实施）to most elementary and high-school students in the United States exert（发挥）an unfavorable influence on science and math teaching， according to a new ＄1 million study performed for the National Science Foundation．And because schools with high minority enrollments（入学）generally place a greater reliance（相信）on scores from these tests， the study finds，there tends to be “a gap in instructional emphases between high and low minority classrooms that differs from our national concern for the quality of education．”
George F．Madaus and his colleagues at Boston College analyzed not only the six most widely used national standardized tests， but also the tests designed to accompany（go with）the four most commonly used science and math texts in fourth-grade，eighth-grade，and high-school classrooms．Though curriculum（teaching program）experts argue that schools should place greater emphasis on problem solving and reasoning， the new study shows that the tests focus on lower-level skills—primarily mechanical memorization of routine formulas（公式）．
Researchers surveyed more than 2，200 math and science instructors，interviewing in depth some 300 teachers and administrators．Especially in schools with high minority enrollments，teachers reported feeling pressured to help students perform well on these tests．Some states judge schools and some schools determine teacher assignments（工作安排）based on students' test scores．
“With so much worry，”Madaus says，“teachers feel forced to focus their instruction on drilling what the tests will measure—at the expense of the more valuable，higher-level skills．”
The author of this article states that ____ _ ．
A．the tests don't affect teaching in most elementary and high schools
B．the science and math teaching is influenced by the present tests
C．no study is performed on tests for the National Science Foundation
D．the United States exerts a strong influence on science and math teaching
It can be inferred that in high minority classrooms ____ _ ．
A．the students can not get high score from the tests
B．scores from the tests are not important
C．instructional emphases are unfavourable
D．teaching doesn't focus on the quality of education
According to the second paragraph，the study has discovered that ____ _ ．
A．emphasis of teaching is on problem solving and reasoning
B．curriculum is good for national standardized tests
C．the tests mainly center around the memorization of some formulas
D．routine formulas are not useful for students to memorize
According to Madaus' opinion，teachers are forced to ____ _ ．
A．evaluate（评估）students' skills every year
B．suffer so much worry on the texts
C．teach what will be tested
D．focus their instruction on useful drillings
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科目：高中英语 来源： 题型：
They were surprised that a four-year-old boy should work out such a difficult problem ____ they themselves couldn’t.
A. once B. then C. while D. if
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