The factory produces half a million pairs of ...

The factory produces half a million pairs of shoes every day, 85% ____ sold abroad.

A. of them are    B. of them is     C. of which is    D. of which are

高三英语单项填空中等难度题查看答案及解析

The factory produces half a million pairs of shoes every year,80%________ are sold abroad.

A.  of them                B. which of                        C. of which                          D. of that

高三英语单项填空中等难度题查看答案及解析

The factory produces half a million pairs of shoes every year, _________ are sold abroad.

A. 80% of them     B. 80% of that              C. 80% of the shoes              D. 80% of which

高三英语单项填空简单题查看答案及解析

Plastic-Eating Worms

Humans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场), and up to 12 million tons pollute the oceans. So far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms.

Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms’ chewing alone was not responsible for the polyethylene breakdown, the researchers made some worms into paste(糊状物) and applied it to plastic films. 14 hours later the films had lost 13% of their mass — apparently broken down by enzymes (酶) from the worms’ stomachs. Their findings were published in Current Biology in 2017.

Federica Bertocchini, co-author of the study, says the worms’ ability to break down their everyday food — beeswax — also allows them to break down plastic. ＂Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well, ＂she explains, ＂The wax worm evolved a method or system to break this bond. ＂

Jennifer DeBruyn, a microbiologist at the University of Tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the worm itself or by its gut microbes(肠道微生物)?

Bertocchini agrees and hopes her team’s findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process — not simply ＂millions of worms thrown on top of the plastic.＂

1.What can we learn about the worms in the study?

A.They take plastics as their everyday food.

B.They are newly evolved creatures.

C.They can consume plastics.

D.They wind up in landfills.

2.According to Jennifer DeBruyn, the next step of the study is to 　　　　　　　 .

A.identify other means of the breakdown

B.find out the source of the enzyme

C.confirm the research findings

D.increase the breakdown speed

3.It can be inferred from the last paragraph that the chemical might 　　　　　　　 .

A.help to raise worms

B.help make plastic bags

C.be used to clean the oceans

D.be produced in factories in future

4.What is the main purpose of the passage?

A.To explain a study method on worms.

B.To introduce the diet of a special worm.

C.To present a way to break down plastics.

D.To propose new means to keep eco-balance.

高三英语阅读理解困难题查看答案及解析

Plastic-Eating Worms

Humans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场), and up to 12 million tons pollute the oceans. So far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms.

Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms’ chewing alone was not responsible for the polyethylene breakdown, the researchers made some worms into paste(糊状物) and applied it to plastic films. 14 hours later the films had lost 13% of their mass — apparently broken down by enzymes (酶) from the worms’ stomachs. Their findings were published in Current Biology in 2017.

Federica Bertocchini, co-author of the study, says the worms’ ability to break down their everyday food — beeswax — also allows them to break down plastic. ＂Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well, ＂she explains, ＂The wax worm evolved a method or system to break this bond. ＂

Jennifer DeBruyn, a microbiologist at the University of Tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the worm itself or by its gut microbes(肠道微生物)?

Bertocchini agrees and hopes her team’s findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process — not simply ＂millions of worms thrown on top of the plastic.＂

1.What can we learn about the worms in the study?

A.They take plastics as their everyday food.

B.They are newly evolved creatures.

C.They can consume plastics.

D.They wind up in landfills.

2.According to Jennifer DeBruyn, the next step of the study is to 　　　　　　　 .

A.identify other means of the breakdown

B.find out the source of the enzyme

C.confirm the research findings

D.increase the breakdown speed

3.It can be inferred from the last paragraph that the chemical might 　　　　　　　 .

A.help to raise worms

B.help make plastic bags

C.be used to clean the oceans

D.be produced in factories in future

4.What is the main purpose of the passage?

A.To explain a study method on worms.

B.To introduce the diet of a special worm.

C.To present a way to break down plastics.

D.To propose new means to keep eco-balance.

高三英语阅读理解困难题查看答案及解析

The other day I buy a pair of leather shoes in a shoe shop. The seller told me he would give “three guarantees” for the shoes. And only four days later, the shoes worn out. So I was angry and returned to the shop hoped to get my money back. I told the seller what had been happened to the shoes. When she knew that I had kept the shoes for four days, he refused, to which I was surprised. I asked him why he didn’t keep his promises. “Do you understand the ‘three guarantees’?” the seller said. “It means the shoes can only be kept in three days!” How a foolish explanation of the “three guarantees”!

高三英语短文改错中等难度题查看答案及解析

Disposing of the garbage we produce every day is a major problem in cities around the world. In the United States, over 160 million tons of garbage is produced every year. Ten percent is recycled, ten percent is burned, and the rest is put in landfills. But finding land for new landfills is becoming more difficult.

A city that has solved this problem in an unusual way is Machida in Tokyo. They have developed a totally new way of dealing with garbage. The key to the operation is that people should work together. Families must divide their garbage into six groups:

The items in Groups 1 to 5 are collected on different days. Large items are only collected upon request. Then the garbage is taken to a centre that looks like a clean new office building or hospital. Inside the centre, special equipment is used to sort and deal with garbage. Almost everything can be reused: garden or kitchen trash becomes fertilizer; garbage that can burn is burned to produce electricity; metal containers and bottles are recycled; and old furniture, clothing, and other useful items are cleaned, repaired, and resold cheaply or given away. The work provides employment for the disabled and gives them a chance to learn new skills.

Nowadays, officials from cities around the world visit Machida to see whether they can use some of these ideas and techniques to solve their own garbage problems.

1. Each year people in the U.S.A. have to find places to put in _______ million tons of garbage.

A.160           B.128               C.16                    D.32

2.George’s family has the following garbage: wooden chairs, empty tins and branches. Into which group should he put the garbage?

A. Group 6, Group 5, Group 1.           B. Group 1, Group 3, Group 2.

C. Group 6, Group 5, Group 2.           D. Group 6, Group 4, Group 1.

3. From the text we know that ________ .

A. those who are working at the garbage disposal centre are disabled persons.

B. without people’s cooperation, the garbage disposal project would be a failure.

C. the items in Group1 and Group6 are not collected on the same day.

D. the garage is taken to a clean new office building for disposal.

高三英语阅读理解中等难度题查看答案及解析

根据所给句子及横线后的汉语意思写出正确形式的单词。

1.Every day the chimneys of factories pour a great deal of smoke, _______________ (污染) the environment little by little.

2.There is no easy _______________ (治愈) for loneliness.

3.His company’s exports have increased _______________ (平稳).

4.A person is most _______________ (失望) when he is in despair.

5.The Russians were _______________ (责备) for the failure of the talks.

高三英语其他题中等难度题查看答案及解析

Millions of people around the world cook their food over smoky fire every day.It is often difficult to find wood for the fire .People who do not have wood must spend large amounts of money on cooking fuel. However, there is a much easier way to cook food using energy from the sun.

Solar cooker, or ovens,have been used for centuries.A Swiss scientist made the first solar oven in seventeen sixty-seven. Today ,people are using solar cookers in many countries around the world. People use solar ovens to cook food and to heat drinking water to kill bacteria and other harmful organisms.

There are three kinds of solar ovens.The first is a box cooker, It is designed with a special wall that shines or reflects sunlight into the box .Heat gets trapped under a piece of glass or plastic covering the top of the cooker. A box oven is effective for slow cooking of large amonts of food.

The second kind of solar oven is a panel cooker. It includes several flat walls.or panels.that directly reflect the sun’s light onto the food. The food is inside a separate container of plastic or glass that traps heat energy. People can build panel cookers quickly and with very few supplies. They do not cost much.In Kenya ,for example ,panel cookers are being manufactured for just two dollars.

The third kind of solar oven is a parabolic cooker.It has rounded walls that aim sunlight directly into the bottom of the oven .Food cooks quickly in parabolic ovens .However, these cookers are hard to make.They must be re-aimed often to follow the sun .Parabolic cookers can also cause burns and eye injuries if they are not used correctly.

You can make solar ovens from boxes or heavy paper. They will not catch fire. Paper burns at two hundred thirty-two degrees Celsius. A solar cooker never gets that hot. Solar ovens cook food at low temperatures over long periods of time. This permits people to leave food to cook while they do other things.

1.What is the main purpose of the author in writing the passage?

A.To tell the readers how to make solar ovens.

B.To advertise the solar ovens.

C.To give the readers brief introduction of solar ovens.

D.To help readers to save cost on fuel.

2.According to the passage we can conclude that ______.

A.panel cooker is the cheapest oven of the three

B.panel cooker is easy to make

C.box cooker is easy to make

D.box cooker is the most effective oven

3.If you have much food to cook ,you’d better choose      .

4.From the passage we know that      .

A.solar cookers are dangerous to use

B.solar cookers don’t burn while cooking

C.solar cookers cost less than other cookers

D.Swiss often use solar cookers while cooking

高三英语阅读理解简单题查看答案及解析

Every day, millions of shoppers hit the stores in full force—both online and on foot—searching for the perfect gift. Aside from purchasing holiday gifts, most people regularly buy presents for other occasions throughout the year, including weddings, birthdays, anniversaries, graduations, and baby showers. This frequent experience of gift-giving can causeambivalentfeelings in gift-givers. Many enjoy the opportunity to buy presents because gift-giving offers a powerful means to build stronger bonds with one’s closest persons. At the same time, many fear the thought of buying gifts; they worry that their purchases will disappoint rather than delight the intended receivers.

What is surprising is that gift-givers have considerable experience acting as both gift-givers and gift-recipients, but nevertheless tend to overspend each time they set out to purchase a meaningful gift. In the present research, we propose a unique psychological explanation for this overspending problem — i.e., that gift-givers equate how much they spend with how much receivers will appreciate the gift (the more expensive the gift, the stronger a gift-recipient’s feelings of appreciation). Although a link between gift price and feelings of appreciation might seem intuitive (凭直觉得到的) to gift-givers, such an assumption may be unfounded. Indeed, we propose that gift-receivers will seldom tend to base their feelings of appreciation on the significance weight of a gift than givers assume.

Why do gift-givers assume that gift price is closely linked to gift-recipients’ feelings of appreciation? Perhaps givers believe that bigger (i.e., more expensive) gifts convey stronger signals of thoughtfulness and consideration. According to Camerer (1988) and others, gift-giving represents a symbolic ritual(礼节), by which gift-givers attempt to signal their positive attitudes toward the intended receiver and their willingness to invest resources in a future relationship. In this sense, gift-givers may be motivated to spend more money on a gift in order to send a “stronger signal” to their intended receiver. As for gift-receivers, they may not consider smaller and larger gifts as representing smaller and larger signals of thoughtfulness and consideration.

In practical terms, people spend hundreds of dollars each year on gifts, but somehow never learn to measure their gift expenses according to personal insight.

1.The underlined word “ambivalent” most nearly means ________.

A.unrealistic B.conflicted C.appreciative D.supportive

2.The authors indicate that people value gift-giving because they feel it ________.

A.functions as a form of self-expression

B.is an inexpensive way to show appreciation

C.requires the gift-receivers to return

D.can serve to strengthen a relationship

3.The authors refer to work by Camerer and others in order to__________.

A.offer an explanation B.introduce an argument

C.question an intension D.support a conclusion

高三英语阅读理解中等难度题查看答案及解析