Think about what you usually have for a meal: Is it a hamburger? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?

It can--in a big way. Scientists attending the American Association for the Advancement of Science meeting in Chicago presented new studies showing how food and its production affect the globe and its warming climate. It is generally believed that global warming is caused by the large amounts of greenhouse gases released into the atmosphere. One of these greenhouse gases is carbon dioxide.

What does this have to do with food? A big part of the carbon dioxide comes from the process of making and eating food, the scientists reported in Chicago. The production of meat contributes to a lot of that carbon dioxide.

The process of making a hamburger, for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow manure(肥料)is a major source of methane(甲烷)--an especially powerful greenhouse gas. By the time a hamburger is finally served on a dinner plate, it has done great harm to the environment.

The message from the research is clear: We can greatly reduce the production of greenhouse gases by eating less meat.

All kinds of meat, the scientists reported, are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide or other greenhouse gases into the air. So shifting our diet to less meat and more vegetables ,as it turns out, may do the world some good.

1.Generally speaking , people believe that global warming is caused by ________.

A. cutting down too many trees.

B. releasing too many greenhouse gases.

C. growing too many vegetables.

D. raising too many cows.

2.Which of the following is NOT true?

A. To make and eat meat requires a great deal of energy.

B. To feed and raise cows on farmland contributes to greenhouse gases.

C. To make and eat hamburgers sends greenhouse gases into the air.

D. To grow and eat vegetables does no harm to the environment.

3.According to the passage , the writer seemingly intends to ________.

A. appeal to us to protect the environment by eating less meat food.

B. persuade us to develop a good eating habit to keep healthy

C. advise us to make less hamburgers in order to save energy.

D. encourage us to grow more vegetables to reduce greenhouse gases.

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2014-2015學(xué)年湖北黃岡中學(xué)等八校高三第二次模擬考試英語卷（解析版） 題型：單項(xiàng)填空

As well as teaching soccer's basic skills and rules, the introduced textbooks will ______team spirit and sense of responsibility.

A. multiply B. distinguish

C. preserve D. develop

查看答案和解析>>

科目：高中英語 來源：2016屆湖南長沙第一中學(xué)高三上第二次月考英語試卷（解析版） 題型：書面表達(dá)

某天你收到如下一封來自筆友的電子郵件，請根據(jù)郵件內(nèi)容回復(fù)一封100字左右的郵件，表示對Tom的歡迎，并詢問他來長沙的具體時(shí)間、住宿安排、課程時(shí)間并說明你需要了解這些的原因。

Dear Li Hua，

Surprise！I enrolled in a camp organized by Chinese Bridge in August and will spend about a week in Changsha．So，we can finally see each other．Learning the Chinese language and visiting some places of interest like Shaoshan Mountain will be part of the camp．I just can't wait to see you．

Tom

查看答案和解析>>

科目：高中英語 來源：2016屆天津靜海第一中學(xué)高三下學(xué)期開學(xué)考試英語試卷（解析版） 題型：其他題

閱讀表達(dá),閱讀下面的短文，請根據(jù)短文后的要求答題。

Choosing the right university for you is a big decision with many factors to consider. The institution that you choose will not only be the one that ensures your academic goals, but it will also be where you will live, learn, play sports, socialize and work for several years. Therefore, before you start filling out those university application forms, take a step back and consider the many variables that affect the “fit” of a university to your unique personality and educational goals. Take a look at the following factors, and decide which ones mean the most to you.

Consider your educational goals. You will discover that different schools are more recognized or progressive in your chosen field of study than others. For this reason, talk to advisors, professionals in your field, or go to clubs organized by the alumni(校友). When you check out school ranking for your major, you may find that your first choice is not really a match, while another fits perfectly.

Consider costs. It will be no surprise to you at this point that not all schools cost the same. Some of the more famous schools are so because they are difficult to get into and difficult to pay for. Don’t let this necessarily stop you. Just keep this consideration in mind as you narrow your list of potential schools.

Choosing a university should not be done only on reputation, but also take the academic programs and overall environment into consideration. Be aware that reputations are sometimes out of date or overstated, so first-hand experience is often beneficial.

Once you’ve identified the factors that are most important to you, you’ve taken the first steps towards making a successful choice. Make sure you pick a university that will serve your needs throughout your university career.

1.What does the passage mainly talk about? (No more than 10 words.)

____________________________________________________________________________

2.There are many factors you need to consider before choosing a university according to the passage, Can you list at least three of them? (No more than 15 words)

____________________________________________________________________________

3.According to the passage, what kind of university is the best for you to choose? (No more than 15words. )

____________________________________________________________________________

4.What does the underlined word “variables” mean in Paragraph 1? (Only one word.)

____________________________________________________________________________

5.In your opinion, what other things do we need to take into consideration before choosing a university besides the things mentioned in the passage? (No more than 20 words.)

____________________________________________________________________________

查看答案和解析>>

科目：高中英語 來源：2016屆天津靜海第一中學(xué)高三下學(xué)期開學(xué)考試英語試卷（解析版） 題型：單項(xiàng)填空

This Monday morning I was informed I _____ as one of three exchange students from our school.

A. had been chosen B. was chosen

C. had been choosing D. was choosing

查看答案和解析>>

科目：高中英語 來源：2016屆黑龍江省哈爾濱高三第一次三校聯(lián)合模擬考英語試卷（解析版） 題型：閱讀理解

Tu Youyou has become the first Chinese woman to win a Nobel Prize, for her work in helping to create an anti-malaria(瘧疾) medicine. The 84-year-old’s route to the honour has been anything but traditional. In China, she is being called the "three nos" winner: no medical degree, no doctorate, and she’s never worked overseas.

In 1967, malaria, a then deadly disease, spread by mosquitoes was decimating Chinese soldiers fighting Americans in the jungles of northern Vietnam. A secret research unit “Mission 523 “was formed to find a cure for the illness. Two years later, Tu Youyou was instructed to become the new head of “Mission 523”.

“Mission523” read ancient books carefully for a long time to find historical methods of fighting malaria. When she started her search for an anti-malarial drug, more than 240,000 compounds(化合物) around the world had already been tested, without any success. Finally, the team found a brief reference to one substance, sweet wormwood（青蒿）, which had been used to treat malaria in China around 400 AD. The team took out one active compound in wormwood, and then tested it. But nothing was effective until Tu Youyou returned to the original ancient text. After another careful reading, she changed the drug recipe one final time, heating the compound without allowing it to reach boiling point.

After the drug showed promising results in mice and monkeys, Tu Youyou volunteered to be the first human recipient of the new drug. “

In any case, Tu Youyou is consistently praised for her drive and passion. One former colleague. Lianda Li, says Ms Tu is “unsociable and quite straightforward”, adding that “if she disagrees with something, she will say it.”

Another colleague, Fuming Liao, who has worked with Tu Youyou for more than 40 years, describes her as a “tough and stubborn woman”. Stubborn enough to spend decades piecing together ancient texts, she applies them to modern scientific practices. The result has saved millions of lives.

1.According to Para. I, we can learn that_______.

A. Tu is the first woman to win a Nobel Prize

B. Tu has a medical degree

C. Tu’s road to success is not traditional

D. Tu discovered a cure for malaria

2. The underlined word “decimating” can be replaced by_______.

A. encouraging B. killing

C. annoying D. benefiting

3. Which of the following statements is true?

A. Tu first invented the idea of using sweet wormwood as a cure.

B. Tu was inspired by medical textbooks published in northern vietnem.

C. The compound needs to be heated to the boiling point to be effective.

D. Over 240,000 compounds were proved ineffective before Tu’s seareh.

4.Tu Youyou can be best described as a _______ person.

A. devoted and stubborn

B. straightforward and mean

C. considerate and tough

D. sociable and generous

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年四川成都七中高二下學(xué)期入學(xué)考英語試卷（解析版） 題型：完形填空

完形填空

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)(A、B、C和D)中，選出可以填入空白處的最佳選項(xiàng)，并在答題卡上將該選項(xiàng)涂黑。

Dale Carnegie rose from the unknown of a Missouri farm to international fame because he found away to fill a universal human need.

It was a need that he first ________ back in 1906 when young Dale was a junior at State Teachers College in Warrensburg. To get an ________ , he was struggling against many difficulties. His family was poor. His Dad couldn’t afford the________ at college, so Dale had to ride horseback 12 miles to attend classes. Study had to be done ________ his farm-work routines. He withdrew from many school activities________ he didn’t have the time or the ________ . He had only one good suit. He tried ________ the football team, but the coach turned him down for being too ________ . During this period Dale was slowly ________ an inferiority complex (自卑感), which his mother knew could ________ him from achieving his real potential. She 51 that Dale join the debating team, believing that ________ in speaking could give him the confidence and recognition that he needed.

Dale took his mother’s advice, tried desperately and after several attempts ________ made it. This proved to be a________ point in his life. Speaking before groups did help him gain the________ he needed. By the time Dale was a senior, he had won every top honor in ________. Now other students were coming to him for coaching and they, ________, were winning contests.

Out of this early struggle to ________ his feelings of inferiority, Dale came to understand that the ability to ________ an idea to an audience builds a person’s confidence. And, ________ it, Dale knew he could do anything he wanted to do—and so could others.

1.A. admitted B. filled C. supplied D. recognized

2.A. assignment B. education C. advantage D. instruction

3.A. training B. board C. teaching D. equipment

4.A. between B. during C. over D. through

5.A. while B. when C. because D. though

6.A. permits B. interest C. talent D. clothes

7.A. on B. for C. in D. with

8.A. light B. flexible C. optimistic D. outgoing

9.A. gaining B. achieving C. developing D. obtaining

10.A. prevent B. protect C. save D. free

11.A. suggested B. demanded C. required D. insisted

12.A. presence B. practice C. patience D. potential

13.A. hopefully B. certainly C. finally D. naturally

14.A. key B. breaking C. basic D. turning

15.A. progress B. experience C. competence D. confidence

16.A. horse-riding B. football C. speech D. farming

17.A. in return B. in brief C. in turn D. in fact

18.A. convey B. overcome C. understand D. build

19.A. express B. stress C. contribute D. repeat

20.A. besides B. beyond C. like D. with

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年內(nèi)蒙古呼倫貝爾大楊鎮(zhèn)二中高二上期末模擬英語卷（解析版） 題型：閱讀理解

CAREER OPPORTUNITES

（1）Full-time Secretary Position Available: Applicants should have at least 2 year's experience and be able to type 60 words a minute．No computer skills required．Apply in person at United Business Ltd，17 Browning Street，Leeds．

（2）Part-time Job: We require three part-time shop assistants to work during the evening．No experience required，applicants should be between 18 and 26 years old．Call 0115665643 for more information．

（3）Computer Trained Secretaries: Do you have experience working with computers? If you want to know more about us，call 0457996754．

（4）Teaching Assistants Needed: Hania's Playshool needs 2 young teaching assistants to help with classes from 9 to 3 pm．Applicants should have references．For more information please visit www．Haniaplayschool．com．uk．

（5）Weekend Work Available: We are looking for retired adults who would like to work part-time on weekends for Rubberlast Group Ltd．Duties include answering the telephone and giving customers' information．For more information call us at 0113—6741326．

（6）University Positions Open: The University of Bristol is looking for 4 teaching assistants to help with homework correction．Applicants should have a degree in one of the following: Political Science，English，Economics or History．Please call the University of Bristol for more information．

（7）Home Delivery Representative: We are looking for someone who has excellent customer care，communication skills，a sales background with at least one year's experience and is a good team player with creative ideas．In return we offer a starting salary of $ 20，000 and 25 days paid holiday per year．For more information please call Direct Delivery Team of Yorkshire Post on 0113—2388318．

1.Which position is most suitable for a retired person?

A．Part-time Shop Assistant．

B．Teaching Assistant in Hania's Playschool．

C．Weekend Work in Rubberlast Group Ltd．

D．Teaching Assistant in the University of Bristol．

2.If you have good computer skills and recently graduated from university （English degree），which jobs can you apply for?

A．Job 1，2 and 7

B．Job 2，3 and 5

C．Job 4，6 and 7

D．Job 3，4 and 6

3.Which is the only position that has a formal educational requirement?

A．University Positions at the University of Bristol．

B．Home Delivery Representative for Yorkshire

C．Teaching Assistant at Hania's Playschool．

D．Full-time Secretary position at United Business Ltd

查看答案和解析>>

科目：高中英語 來源：2016屆山東日照一中高三上學(xué)期期末英語試卷（解析版） 題型：完形填空

完形填空

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng) (A、B、C和D)中，選出可以填入空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。

My Air Force room in Florida was empty and quiet—I was alone. My five roommates were gone for their ________ ; I had chosen to ________ behind in the camp. Being young and far from my home, I felt ________ . My room was comfortable enough, but I hadn’t ________ until then what made it so—the presence of others walking, joking or just lying on their ________ .

I was not able to sleep. In fact, I________ being alone sometimes, but tonight was ________ . Turning over again and again in the darkened room gave no ________ . The last sign of daylight had disappeared, ________ to my inner depression. ________ , the Christmas lights on the tall pine trees would only ________ me of my great misery.

________ , I heard weak sound of men attempting to sing. Yes, the voices grew louder and came my way. I ________ still, enjoying the sound.

In the corridor (走廊) outside my ________ , voices came near enough for ________ to hear Christmas carols being sung. Suddenly, there, four airmen, identities unknown, were slightly unsteadied by holiday cheer. The first held a Coke bottle with a ________ candle stuck in its top. The others ________ a dancing line behind him.

Seeing I was in the room, with joyful ________ in the flickering(搖曳的) light, they sang me several carols, ________ me a merry Christmas and left as fast as they had arrived.

I slept soundly soon after, burying my face in my pillow, ________ that someone had cared.

1.A. presents B. fights C. holidays D. weekends

2.A. remain B. sleep C. help D. work

3.A. guilty B. silly C. curious D. lonely

4.A. prepared B. realized C. recovered D. awoken

5.A. toys B. food C. beds D. floors

6.A. imagined B. preferred C. suggested D. began

7.A. different B. busy C. good D. simple

8.A. balance B. effort C. comfort D. progress

9.A. adding ` B. appealing C. leading D. sticking

10.A. Therefore B. Otherwise C. Yet D. Besides

11.A. cure B. remind C. rob D. think

12.A. Suddenly B. Sadly C. Unluckily D. Lately

13.A. stared B. sang C. lay D. observed

14.A. house B. room C. school D. camp

15.A. us B. them C. whom D. me

16.A. lighted B. falling C. burned D. flying

17.A. broke B. crossed C. formed D. drew

18.A. noises B. quarrels C. necks D. faces

19.A. predicted B. promised C. wished D. offered

20.A. grateful B. satisfied C. doubtful D. hopeful

查看答案和解析>>

同步練習(xí)冊答案