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提问人:网友jj_wong 发布时间:2022-01-07
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When enthusiasts talk of sustainable development, the eyes of most people glaze over. Ther

e is a whiff of sack-cloth and ashes about their arguments, which usually depend on people giving up the comforts of a modern economy to achieve some debatable greater good. Yet there is a serious point at issue. Modern industry pollutes, and it also seems to cause significant changes to the climate. What is needed is an industry that delivers the benefits without the costs. And the glimmerings of just such an industry can now be discerned.

That industry is based on biotechnology. At the moment, biotech's main uses are in medicine and agriculture. But its biggest long-term impact may be industrial. Here, it will diminish demand for oil by taking the cheapest raw materials imaginable, carbon dioxide and water, and using them to make fuel and plastics.

Plastics and fuels made in this way would have several advantages. They could accurately be called "renewables", since nothing is depleted to make them. They would be part of the natural carbon cycle, borrowing that element from the atmosphere for a few months, and returning it when they were burned or dumped. That means they could not possibly contribute to global warming. And they would be environmentally friendly in other ways. Bioplastics are biodegradable, since bacteria understand their chemistry and can therefore digest them. Biofuels, while not quite "zero emission" from the exhaust pipe (though a lot cleaner than petrol and diesel), would be cleaner overall even than the fuel-cell technology now being touted as an alternative to the internal-combustion engine. That is because making the hydrogen that fuel cells use is not an environmentally friendly process, and never will be—unless it, too, uses biotechnology.

All this will, in the end, depend on costs. But these do not look unfavourable. Already, the price of bioplastics overlaps the top end of the petroleum-based plastics market. Bulk production should bring prices 'down, particularly when the raw materials are free. Meanwhile, ethanol would be a lot easier to introduce than fuel cells. Existing engines will run on it with minor tweaking, so there is no need to change the way ears are made. And since, unlike hydrogen, it is a liquid, the fuel-distribution infrastructure would not need radical change.

The future could be green in ways that traditional environmentalists had not expected. Whether they will embrace that possibility, or stick to sack-cloth, remains to be seen.

According to the author, applying biotechnology to industry

A.has brought about sustainable development.

B.proves to be nothing but an imagination.

C.will deprive most people of modern comforts.

D.contributes to the environmentally sound development.

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更多“When enthusiasts talk of sustainable development, the eyes of most people glaze over. Ther”相关的问题
第1题
听力原文:Health food gained popularity when people began to think more seriously about the
ir physical well-being. The well term "health food" is ironic because it implies that there's also "unhealthy" food. Health food includes natural food with minimal processing, i. e. , there are no preservatives to help it last longer or other chemicals to make it taste or look better. Most health food enthusiasts are vegetarians: They eat no meat; they prefer to get their essential proteins from other sources, such as beans, cheese and eggs.

______

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第2题
Most people would define optimism as endlessly happy, with a glass that’s perpetually half
fall. But that’s exactly the kind of false deerfulness that positive psychologists wouldn’t recommend. “Healthy optimists means being in touch with reality.” says Tal Ben-Shahar, a Harvard professor, According to Ben- Shalar,realistic optimists are these who make the best of things that happen, but not those who believe everything happens for the best.

Ben-Shalar uses three optimistic exercisers. When he feels down-sag, after giving a bad lecture-he grants himself permission to be human. He reminds himself that mot every lecture can be a Nobel winner; some will be less effective than others. Next is reconstruction, He analyzes the weak lecture, leaning lessons, for the future about what works and what doesn’t. Finally, there is perspective, which involves acknowledging that in the ground scheme of life, one lecture really doesn’t matter.

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第3题
Ultralight(超轻型的) airplanes are a recent development in aviation that provide what avia

Ultralight(超轻型的) airplanes are a recent development in aviation that provide what aviation enthusiasts have long been seeking: an inexpensive airplane that is easy to fly. The ultralight plane was born of the marriage of the hang glider and the go-kart(微型单座赛车) engine around 1974, when John Moody mounted a 12-horsepower go-kart engine on his Icarus Ⅱ hang glider.

Today’s ultralights are not just hang gliders with engines; they are" air recreation vehicles". Modem ultralight planes use snowmobile(雪地机动车)engines that let them cruise at about 50 miles per hour, climb at about 500 feet per minute, and carry combined payloads of pilot and fuel up to about 200 pounds, which is about equal to an ultralight plane’s weight when empty. More than ten thousand ultralight planes were sold last year at prices ranging from $ 2,800 to $ 7,000. But the main reason for the increasing popularity of these aircraft is not that they are inexpensive, but that they are fun to fly.

The modern ultralight plane would look very familiar to the earliest pioneers of aviation. Otto Lilienthal made more than 2000 flights in Germany in the 1890’s in what were actually hang gliders. Octave Chanute designed and built many early hang gliders. Augustus Herring, Chanute’s assistam, used these gliders as models for a glider that he built for him self. On this glider, Herring installed a compressed-air motor and flew 267 feet in 1898. The Wright brothers' Flyer was the grandfather of today’s ultralight plane. The pilot sat right out in the open, just as in modem ultralights, and used con trois that were much the same as those used in today's machines.

Though most ultralight planes are used for pleasure flying, some are also used for crop dusting, aerial photography, and even military observation service. The likelihood is that further uses will be found for ultralight planes, but their greatest use will continue to be as air recreational vehicles.

The author seems to feel that ultralight airplanes are ______.

A.a toy for the rich

B.nothing but hang gliders

C.a new development that meets the needs of aviation enthusiasts

D.the most important development in aviation since the Wright brothers' Flyer

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第4题
A.practitionersB.enthusiastsC.refereesD.recipients

A.practitioners

B.enthusiasts

C.referees

D.recipients

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第5题
HOW TO BOOKBooking opens for Beckett Shorts on 8 September.BY TELEPHONEFor credit card(信

HOW TO BOOK

Booking opens for Beckett Shorts on 8 September.

BY TELEPHONE

For credit card(信用卡) bookings. Calls are answered.

BOX OFFICE

01789 295623 9 a. m.- 8 p. m. (Mon.- Sat. )

0541 541051(24 hours,7 days, no booking charge)

BY FAX

For credit card bookings. Please allow at least 48 hours for reply, if required.

BOX OFFICE

01798 261974 or 01862 387765

BY POST

Please enclose (附上) a cheque or credit card details together with an SAE or add 50p to the to tal amount (总额)to cover postage. Please send to the Box Office, RST, Stratford-upon-Avon.

CV 376BB.

Booking opens for all other plays on 19 September.

IN PERSON

BOX OFFICE

RST hall,9:30a, m.- 8p. m. (Mon.- Sat. ) (6p. m. when theatres are closed).

OVERSEAS BOOKING

The easiest method if payment is by credit card. You can also pay by: Eurocheque(up to $500)with your card number written on the back.

PAYING FOR YOUR TICKETS

CREDIT CARDS

We accept Visa, master Card, American Express and Diners Club. Please give the card number, name and address of cardholder.

CHEQUES

Cheques and postal orders should be payable to: Royal Shakespeare Theatre.

In which of the following ways of booking does one probably have to pay extra money?

A.In person.

B.By telephone.

C.By fax.

D.By post.

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第6题
LTE的寻呼区域采用()

A.TAC

B.RAC

C.LAC

D.TAL

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第7题
For wildlife enthusiasts the journey is ________ because the region is known for its

A. funny

B. worthy

C. pleased

D. worthwhile

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第8题
(LTE)以下哪些选项关于TAL边界设计描述是错误的?

A.边界不要放在话务密集区域

B.边界划分要考虑用户的移动行为

C.TAL划分可以利用地形因素来作为边界

D.TAL划分可以不连续,出现插花现象,对网络没有影响

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第9题
Gun enthusiasts believe that ______.A.teachers should carry guns to protect themselves.B.g

Gun enthusiasts believe that ______.

A.teachers should carry guns to protect themselves.

B.gun carriers should be punished if they attempt to kill children.

C.it is too difficult for the teachers to obtain guns.

D.children should be protected by their teachers who carry guns.

点击查看答案
第10题
When enthusiasts talk of sustainable development, the eyes of most people glaze over. Ther
e is a whiff of sack-cloth and ashes about their arguments, which usually depend on people giving up the comforts of a modern economy to achieve some debatable greater good. Yet there is a serious point at issue. Modern industry pollutes, and it also seems to cause significant changes to the climate. What is needed is an industry that delivers the benefits without the costs. And the glimmerings of just such an industry can now be discerned.

That industry is based on biotechnology. At the moment, biotech's main uses are in medicine and agriculture. But its biggest long-term impact may be industrial. Here, it will diminish demand for oil by taking the cheapest raw materials imaginable, carbon dioxide and water, and using them to make fuel and plastics.

Plastics and fuels made in this way would have several advantages. They could accurately be called "renewables", since nothing is depleted to make them. They would be part of the natural carbon cycle, borrowing that element from the atmosphere for a few months, and returning it when they were burned or dumped. That means they could not possibly contribute to global warming. And they would be environmentally friendly in other ways. Bioplastics are biodegradable, since bacteria understand their chemistry and can therefore digest them. Biofuels, while not quite "zero emission" from the exhaust pipe (though a lot cleaner than petrol and diesel), would be cleaner overall even than the fuel-cell technology now being touted as an alternative to the internal-combustion engine. That is because making the hydrogen that fuel cells use is not an environmentally friendly process, and never will be—unless it, too, uses biotechnology.

All this will, in the end, depend on costs. But these do not look unfavourable. Already, the price of bioplastics overlaps the top end of the petroleum-based plastics market. Bulk production should bring prices 'down, particularly when the raw materials are free. Meanwhile, ethanol would be a lot easier to introduce than fuel cells. Existing engines will run on it with minor tweaking, so there is no need to change the way ears are made. And since, unlike hydrogen, it is a liquid, the fuel-distribution infrastructure would not need radical change.

The future could be green in ways that traditional environmentalists had not expected. Whether they will embrace that possibility, or stick to sack-cloth, remains to be seen.

According to the author, applying biotechnology to industry

A.has brought about sustainable development.

B.proves to be nothing but an imagination.

C.will deprive most people of modern comforts.

D.contributes to the environmentally sound development.

点击查看答案
第11题
线路电流传感器英文缩写为TAL,线路电压传感器的英文缩写为TPM。()
点击查看答案
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