Deserts are found where there is little rainfall or where rain for a whole year falls in only a few weeks' time. Ten inches of rain may be enough for many plants to survive (存活)if the rain is spread throughout the year, If it falls within one or two months and the rest of the year is dry, those plants may die and a desert may form.

Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down. Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the dunes grow over the years, always moving with the winds and changing the shape. Most of them are only a few feet tall, but they can grow to be several hundred feet high.

There is, however, much more to a desert than sand. In the deserts of the southwestern United States, cliffs (懸崖) and deep valleys were formed from thick mud that once lay beneath a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand, rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing –-very, very slowly ---as these forces of nature continue to work on the rock.

Most deserts have a surprising variety of life. There are plants, animals and insects that have adapted to life in the desert. During the heat of the day a visitor may see very few signs of living things, but as the air begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert once again becomes quiet and lonely.

1.Many plants may survive in deserts when__________________.

A. it is dry all the year round

B. the rain falls only in a few weeks

C. there is little rain in a year

D. the rain is spread out in a year

2.Sand dunes are formed when___________________.

A. sand piles up gradually

B. there is plenty of rain in a year

C. the sea has dried up over the years

D. pieces of rock get smaller

3.The underlined sentence in the third paragraph probably means that in a desert there is____________.

A. too much sand

B. more sand than before

C. nothing except sand

D. something else besides sand

4.It can be learned from the text that in a desert____________.

A. there is no rainfall throughout the year

B. life exists in rough conditions

C. all sand dunes are a few feet high

D. rocks are worn away only by wind and heat

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2015-2016學(xué)年內(nèi)蒙古包頭第九中學(xué)高二上期中英語試卷（解析版） 題型：短文改錯

短文改錯

短文中共有10處錯誤，錯誤涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏詞符號(∧)，并在此符號下面寫出該加的詞。

刪除：把多余的詞用斜線( \ )劃掉。

修改：在錯的詞下劃一橫線，并在該詞的下面寫出修改后的詞。

注意：

1. 每處錯誤及其修改均僅限一詞；

2. 只允許修改10處，多者(從第11處起)不計分。

We receive your application last week. We regret to inform you that our company has hired a boy calling Tonny the job of the manager assistant. Having studied your certificate careful，we decided that we should hire someone with more office experiences for this particular position. You have impressed them with your desire to learn and your ability to work hard, but we do hope that you will apply for a position in our company sometime in the future. We would like to thank you on your being interested in our company. Please to contact us if there is any further questions.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年廣東深圳高級中學(xué)高二上學(xué)期期中英語試卷（解析版） 題型：閱讀理解

閱讀理解

閱讀下列四篇短文，從每小題后所給的A、B、C、D四個選項中，選出最佳選項，并在答題卡上將該選項涂黑。

A family story is like a puzzle. Each family member leaves some clues. Family members come together because they have a common tie with one another, sharing a name and special traditions. Exploring family roots and sharing past memories ensure each tradition lives on.

Ancestory.com has created customized (訂做的) “Our Name is History” books to give your family a look into your history by learning about your last name. By visiting it, you can check if information is available for your last name. Ancestory.com researchers have collected more than 5 billion names from records such as passenger lists, immigration records and from birth, marriage and death records. The collected information is then used for each customized book.

“Our Name is History” books are available for nearly 200,000 last names, accounting form 85 percent of all the US homes. The collected information is a great start of learning about your family roots. This book will not only surprise your mother, but also become a precious memory to pass down through the generations. It can also be an inspiration for her to talk about all the special women in her life. So instead of just giving her flowers or jewelry, give her a special family name book and share your favorite memories with her.

After learning the general history of your last name, your might be inspired to continue your exploration. The “Our Name is History” books include a special software product for building, searching and sharing your family history.

To learn more about “Our Name is History” books, visit www. Ournameinhistory.com. The deadline to order in time for Mother’s Day is April 30.

1. The first paragraph mainly talks about _________.

A. the importance of exploring family root

B. what a family story really is

C. the importance of a family name

D. how to pass down a family’s traditions

2.What does the underlined word “it” refer to in Paragraph 2?

A. The “Our Name is History” book.

B. The website Ancestory.com.

C. The website www. ournameinhistory.com.

D. The family’s last name.

3.The “Our Name is History” books _________.

A. are very cheap compared with flowers or jewelry

B. can tell us where we should look to find out family history

C. cover the last names of all Americans

D. can tell us origins of our last names

4.What will mothers do if they get “Our Name is History” books?

A. They may be inspired to talk about some special women they remember.

B. They will collect information about their family roots.

C. They will learn how great their ancestors are.

D. They will share them with some other families.

5. What’s the purpose of the author in writing this passage?

A. To tell us how to explore family roots.

B. To help family traditions to live on.

C. To advertise “Our Name is History” books.

D. To tell us how to create our own family history.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年黑龍江牡丹江第一中學(xué)高二上期末英語試卷（解析版） 題型：七選五

根據(jù)短文內(nèi)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。

We are not born with courage, but neither are we born with fear. Fears, even the most basic ones, can totally destroy our ambitions. Fear can destroy fortunes. Fear can destroy relationships. Fear, if left unchecked, can destroy our lives. Fear is one of the many enemies living inside us.

1.

The first enemy we face is indecision. Indecision is the thief of opportunity. __2. Take a sword to this enemy.

The second enemy inside is doubt.___ 3.___But you also can’t let doubt take over. Many people doubt the past, doubt the future, doubt each other, doubt the government, doubt the possibilities and doubt the opportunities. Worst of all, they doubt themselves. I’m telling you, doubt will destroy your life and your chances of success. It will empty both your bank account and your heart. 4.

Do battle with the enemies. Do battle with your fears. 5. Be courageous in your life and in your pursuit of the things you want and the person you want to become.

A. Sure, there’s room for healthy doubt. You can’t believe everything

B. Build your courage to fight what’s holding you back, what’s keeping you from your goals and dreams.

C. Let me tell you about two of the other enemies we face from within.

D. Below are the ways which might be useful for us to overcome our fears.

E. Doubt is an enemy. Go after it. Get rid of it.

F. It will steal your chances for a better future.

G. Some people doubt everything.

查看答案和解析>>

科目：高中英語 來源：2016屆甘肅蘭州第一中學(xué)高三12月月考英語試卷（解析版） 題型：閱讀理解

Singles' Day ---- the Chinese opposite of Valentine’s Day has turned into a massive online shopping event. It is a day when single people are supposed to buy themselves presents. But there are sociological reasons behind China's “celebration” of single life. And the imbalance could have big consequences for the country.

There were 34 million more men than women in China in 2011. Part of that is natural – usually there are 105 boys born for every 100 girls. But the Chinese gender ratio (性別比例) at birth is much more obvious. It was 116 boys to 100 girls in 2012. The one child policy is largely to blame. Brought in to limit population expansion, the policy allows only one child per family. But because male children are seen as more valuable, as well as more likely to support their parents in old age, some parents choose to have a son over a daughter. The result is that large numbers of men will likely never get married. In fact, one study has predicted that by 2030, 1 in 5 Chinese men in their 30s will never have married, while another states that 94% of unmarried people in China are men.

Traditionally, China has seen high levels of marriage, usually among the young. Besides, the increased education and career opportunities for women have meant that marriages are happening later. It is also traditional that women often marry men of a higher socioeconomic status than themselves. So women at the top and men at the bottom find themselves alone. One study has even suggested a link between an imbalanced gender ratio and growth in violent crime in the country.

Singles’ Day can’t solve all the problems China’s singles face. Indeed, it is possible that it is causing even more problems, as men resort to increasingly risky lines of work to increase their chances of gaining money and thus a wife. I am worried that as money starts to overcome romance, there is evidence that China ' s marriage market is increasingly materialistic.

1.In 2012, if 50 girls were born, how many boys were probably born?

A. 50. B. 52. C. 58. D. 60.

2.What made women in China get married late?

A. Their support of the government’s late marriage policy.

B. Their higher education level and more work chances.

C. That they expect to enjoy their single time when young.

D. That there are too many excellent young men to choose from.

3.What’s the writer’s attitude to the imbalance gender ratio in China?

A. Optimistic B. Concerned

C. Indifferent D. Unknown

4.We can learn from the passage that .

A. Singles' Day is celebrated all over the world.

B. by 2030, 1 in 5 Chinese women in their 30s will be out of marriage.

C. an imbalanced gender ratio is related to the growth in violent crime.

D. Singles' Day will solve all the problems China’s singles face.

查看答案和解析>>

科目：高中英語 來源：2016屆福建廈門雙十中學(xué)高三上學(xué)期期中英語試卷（解析版） 題型：單詞拼寫

根據(jù)下列句子單詞首字母或所給漢語注釋，在橫線上寫出空缺處各單詞的正確形式。（每空只寫一詞）

1.After the police arrested him, they went to the thief’s house to （追回）the stolen jewelry.

2.Some adverts about __________（環(huán)境）protection cater for our conscience or our desire to be respectable citizens.

3.Though he has retired, still he reads newspapers every day to keep himself i of the latest news.

4.Oh, I’ve put on weight recently. I should eat less and take exercise on a r basis.

5.As we know, Wardian cases improved the __________ （存活） rates of plants transported long distances.

6.In the center of the b of flats, there is a small courtyard where I can plant some flowers.

7.In France the children place their shoes by the fireplace, a tradition d back to when children wore wooden peasant shoes.

8.I was quite annoyed the other day, with Xiamen Airline c me extra for the overweight luggage.

9.The young girl has been __________（提拔）from an ordinary office clerk to a manager due to her excellent performance.

10.These comments came in r to specific questions often asked by local newsmen.

11.Some cigarette advertisements are not aimed at mature audiences but instead t at children.

12.Another __________（潛在）dangerous sea animal is the jelly fish, which can cause severe pain to anyone who touches them.

13.If an alarm is s , do get out of the water as quickly as possible, as sharks are spotted nearby.

14.Many countries have a government organization to deal with customers’ __________（投訴）about ads.

15.Teaching as a career ____________（吸引）to many young people because of the long holiday.

查看答案和解析>>

科目：高中英語 來源：2016屆浙江臨海臺州中學(xué)高三上第三次統(tǒng)練英語試卷（解析版） 題型：閱讀理解

Are you a compulsive (強迫性的) spender, or do you hold on to your money as long as possible? Are you a bargain hunter? Would you rather use charge accounts than pay cash? Your answers to these questions will reflect your personality. According to psychologists, our individual money habits not only show our beliefs and values, but can also stem from past problems.

Experts in psychology believe that for many people, money is an important symbol of strength and influence. Husbands who complain about their wives’ spending habits may be afraid that they are losing power in their marriage. Wives, on the other hand, may waste huge amounts of money because they are angry at their husbands. In addition, many people consider money a symbol of love. They spend it on their family and friends to express love, or they buy themselves expensive presents because they need love.

People can be addicted to different things — for example, alcohol, drugs, certain foods, or even television. They are compulsive in their addictions, i.e. they must satisfy these needs to feel comfortable. In the same way, according to psychologists, compulsive spenders must spend money. For people who buy on credit, furthermore, charge accounts are even more exciting than money: in other words, they feel that with credit, they can do anything. Their pleasures in spending enormous amounts are actually greater than those they get from the things they buy.

There is even a special psychology of bargain hunting. To save money, of course, most people look for sales, low prices, and discounts. Compulsive bargain hunters, however, often buy things that they don’t need just because they are cheap. They want to believe that they are helping their budgets, but they are really playing an exciting game: when they can buy something for less than other people, they feel that they are winning. Most people, experts claim, have two reasons for their behavior: a good reason for the things that they do and the real reason.

It is not only scientists, of course, who understand the psychology of spending habits, but also business people. Stores, companies, and advertisers use psychology to increase business: they consider people’s needs for love, power, or influence, their basic values, their beliefs and opinions, etc. in their advertising and sales methods.

Psychologists often use a method called “behavior therapy(療法)” to help individuals solve their personality problems. In the same way, they can help people who feel that they have problems with money: they give them “assignments”. If a person buys something in every store that he enters, for instance, a therapist might teach him self-discipline in this way: on the first day of his therapy, he must go into a store, stay five minutes, and then leave. On the second day, he should stay for ten minutes and try something on. On the third day, he stays for fifteen minutes, asks the salesclerk a question, but does not buy anything. Soon he will learn that nothing bad will happen to him if he doesn’t buy anything, and he can solve the problem of his compulsive buying.

1.If you use charge accounts, ______.

A. you pay in cash

B. you pay with credit card

C. you pay less than you should

D. you pay more than you should

2.Compulsive bargain hunters buy things for all the following reasons except that ______.

A. the things they buy are cheap

B. they believe they can balance their budgets

C. they get psychological satisfaction

D. they really need the things they buy

3.Behavior therapy in this case aims at ______.

A. helping businessmen to increase their business

B. helping compulsive spenders to buy less

C. finding out how people will react if they are allowed to buy

D. finding out what people will do in front of a bargain

4.The underlined word “those” in Paragraph 3 refers to ______.

A. different things B. their addictions

C. their pleasures D. charge accounts

5.From the passage we can conclude that ______________.

A. how you spend money reflects if you are psychologically healthy

B. money is a necessity and will bring you happiness if you have much

C. compulsive buying problems can be solved by taking some medicine

D. all businessmen understand well the psychology of customers

查看答案和解析>>

科目：高中英語 來源：2016屆廣東廣州執(zhí)信中學(xué)高三上學(xué)期期中英語試卷（解析版） 題型：單項填空

People in those days liked to believe in computers ________ the world.

A. taking over and ruling B. take over and rule

C. that took over and rule D. to take over and rule

查看答案和解析>>

科目：高中英語 來源：2016屆河南八市高三12月聯(lián)考英語試卷（解析版） 題型：閱讀理解

A California man who was feeling sick almost died recently from a shocking cause.

26-year-old Luis Ortiz went to a hospital because of a headache and nausea(惡心，作嘔). When doctors examined him, they were shocked to find a tapeworm larva(絳蟲幼蟲) in his brain. The story gets stranger. The larva was still alive.

The creature had caused a cyst(囊腫) to form inside his head. The cyst was restricting the flow of liquids to different areas of his brain. The situation was so serious that doctors said they had to perform an emergency operation to remove the larva.

A doctor who operated on Ortiz told him he had only 30 minutes to live. When the doctor pulled the worm out of his head, it was still moving.

Luis Ortiz was a student at California State University in Sacramento. He began experiencing headaches in late August. But Ortiz said he did not think the headaches were serious.

In September, he visited a friend and his parents in another city. That is when the pain got worse. His mother saw Ortiz throwing up and took him to a hospital emergency room.

The doctors saved Ortiz's life. However, the surgery also affected him. Ortiz had to drop out of school and move back home. For now, he is not permitted to work or drive a vehicle.

The U.S. Centers for Disease Control and Prevention says the U.S. has about 1,000 reported cases of tapeworms each year. The CDC adds that tapeworms are more common in developing countries with poor public health systems.

The best way to avoid a tapeworm infection (感染)is to wash fruits and vegetables. Also, make sure meat is cooked thoroughly. The CDC suggests cooking all meats to an internal temperature of at least 63 degrees Celsius.

1. What caused Luis Ortiz to feel sick and headaches?

A. Dirty food eaten in August.

B. Travelling for a long way,

C. A living creature in his brain.

D. Uncooked meat eaten by him.

2.If the doctors didn’t have an emergency operation on him , Luis Ortiz was likely to ________ _ .

A. die of cancer B. live for only half an hour

C. finish studying in school D. pass the driving tests

3. How should people avoid infecting tapeworms?

A. By washing fruits and vegetable.

B. By boiling plates and bowls before meals.

C. By cooking meats to at least 63 °C outside,

D. By improving the development of economy.

4. What did the writer think of the cause of Luis Ortiz’s disease?

A. Quite frightening. B. Very dangerous.

C. Rather puzzling. D. Extremely surprising.

查看答案和解析>>

同步練習(xí)冊答案