The Tough Grass That Sweetens Our Lives
Sugar cane was once a wild grass that grew in New Guinea and was used by local people for roofing their houses and fencing their gardens. Gradually a different variety evolved which contained sucrose(蔗糖) and was chewed on for its sweet taste. Over time, sugar cane became a highly valuable commercial plant, grown throughout the world. (46)
Sugar became a vital ingredient in all kinds of things, from confectionery (糖果点心) to medicine, and, as the demand for sugar grew, the industry became larger de more profitable. _ _ (47) Many crops withered(枯萎) and died, despite growers , attempts to save them and there were fears that the health of the plant would continues to deteriorate.
In the 1960s, scientists working in Barbados looked for ways to make the commercial species stronger and more able to resist disease. They experimented with breeding programmes, mixing genes from the wild species of sugar cane, which tends to be tougher, with genes from the more delicate, commercial type. _ (48) This sugar cane is not yet ready to be sold commercially, but when this happens, it is expected to be incredibly profitable for the industry.
_ (49) Brazil, which produces one quarter of the world&39;s sugar, has coordinated an inter-national project under Professor Paulo Arrudo of the Universidade Estaudual de Campinas in Sao Pau-lo. Teams of experts have worked with him to discover more about which parts of the genetic structure of the plant are important for the production of sugar and its overall health.
Despite all the research, however, we still do not fully understand how the genes in sugar cane. (50) This gene is particularly exciting because it makes the plant resistant to rust, a disease which probably originated in India, but is now capable of infecting sugar cane across the world. Scien-tist believe they will eventually be able to grow a plant which cannot be destroyed by rust.
46
??A.One major gene has been identified by Dr Angelique D&39;Hont and her team in Montpelier, France.B.Since the 1960s, scientists have been analyzing the mysteries of the sugar cane&39;s genetic codeC.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.D.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.E.Unfortunately, however, the plant started to become weaker and more prone to diseaseF.The majority of the world&39;s sugar now comes from this particular commercial species. ??
47
A.One major gene has been identified by Dr Angelique D&39;Hont and her team in Montpelier, France.B.Since the 1960s, scientists have been analyzing the mysteries of the sugar cane&39;s genetic codeC.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.D.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.E.Unfortunately, however, the plant started to become weaker and more prone to diseaseF.The majority of the world&39;s sugar now comes from this particular commercial species.
48
A.One major gene has been identified by Dr Angelique D&39;Hont and her team in Montpelier, France.B.Since the 1960s, scientists have been analyzing the mysteries of the sugar cane&39;s genetic codeC.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.D.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.E.Unfortunately, however, the plant started to become weaker and more prone to diseaseF.The majority of the world&39;s sugar now comes from this particular commercial species.
49
A.One major gene has been identified by Dr Angelique D&39;Hont and her team in Montpelier, France.B.Since the 1960s, scientists have been analyzing the mysteries of the sugar cane&39;s genetic codeC.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.D.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.E.Unfortunately, however, the plant started to become weaker and more prone to diseaseF.The majority of the world&39;s sugar now comes from this particular commercial species.
50
A.One major gene has been identified by Dr Angelique D&39;Hont and her team in Montpelier, France.B.Since the 1960s, scientists have been analyzing the mysteries of the sugar cane&39;s genetic codeC.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.D.Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.E.Unfortunately, however, the plant started to become weaker and more prone to diseaseF.The majority of the world&39;s sugar now comes from this particular commercial species.
请帮忙给出每个问题的正确答案和分析,谢谢!
第3题
48
A. Social support cushions stress in a number of ways.B. Social support consists of the exchange of resources among people based on their interpersonal ties.C. Finally, other people may give us instrumental supportD. People can&39;t live without social support.E. and the absence of such support makes poor health more likelyF. Second, other people often provide us with informational support.
第4题
??47??
A. Social support cushions stress in a number of ways.B. Social support consists of the exchange of resources among people based on their interpersonal ties.C. Finally, other people may give us instrumental supportD. People can&39;t live without social support.E. and the absence of such support makes poor health more likelyF. Second, other people often provide us with informational support.
第6题
tor and the air-conditioner have played an important role ______ .
第7题
49
A. Social support cushions stress in a number of ways.B. Social support consists of the exchange of resources among people based on their interpersonal ties.C. Finally, other people may give us instrumental supportD. People can&39;t live without social support.E. and the absence of such support makes poor health more likelyF. Second, other people often provide us with informational support.
第8题
al result will be. Late on Friday, 8 November, 1895, Professor Rontgen, a German physicist, was doing an experiment in his laboratory when he noticed something extraordinary. He had covered an electric bulb with black cardboard, and when he switched on the current he saw little dancing lights on his table. (46) ; how then could any ray penetrate? On the table there were some pieces of paper which had been covered with metal salts. (47) . Professor Rontgen took a piece of this paper and held it at a distance from the lamp. Between it and the lamp he placed a variety of objects, a books, a pack of cards, a piece of wood and a door key. The ray penetrated every one of them except the key. He called his wife into the laboratory and asked her to hold her hand between the lamp and a photographic plate. (48) , but she held up her hand for a quarter of an hour, and when the plate was developed there was a picture of the bones of her hand and of the ring on one finger. The mysterious ray could pass through the flesh and not through the bone or the ring.
At a scientific meeting, Professor Rontegen called this new ray "the unknown", the X-ray. (49) , and soon there were X-ray machines in all the big hospitals. The most obvious use for this discovery was to enable doctors to see exactly how a bone was fractured. Other uses came later. It was found that these rays could be used to destroy cancer cells, just as they destroyed the healthy cells of the doctors who first used the machines. (50) , and the lungs could be X-rayed to show if there was any tuberculosis present.
46
A. It was on this paper that the lights were shiningB. She was very surprised by this requestC. Now the bulb was completely coveredD. It was a great inventionE. Methods were found later by which ulcers in the stomach could be locatedF. Doctors quickly saw how this could be used
47
A. It was on this paper that the lights were shiningB. She was very surprised by this requestC. Now the bulb was completely coveredD. It was a great inventionE. Methods were found later by which ulcers in the stomach could be locatedF. Doctors quickly saw how this could be used
48
A. It was on this paper that the lights were shiningB. She was very surprised by this requestC. Now the bulb was completely coveredD. It was a great inventionE. Methods were found later by which ulcers in the stomach could be locatedF. Doctors quickly saw how this could be used
49
A. It was on this paper that the lights were shiningB. She was very surprised by this requestC. Now the bulb was completely coveredD. It was a great inventionE. Methods were found later by which ulcers in the stomach could be locatedF. Doctors quickly saw how this could be used
50
A. It was on this paper that the lights were shiningB. She was very surprised by this requestC. Now the bulb was completely coveredD. It was a great inventionE. Methods were found later by which ulcers in the stomach could be locatedF. Doctors quickly saw how this could be used
请帮忙给出每个问题的正确答案和分析,谢谢!
第9题
on through mutual cooperation. The key is for one party to offer the other party something that they will perceive as valuable but which does not harm the party conceding it. ______【46】In this way, both sides will win. Unlike traditional negotiations in which the negotiators have an adversarial relationship, in a win-win negotiation, they view each other as collaborators who are working toward a mutual goal. ______【47】
One case study of a win-win negotiation is often cited as an example. Tony had an idea for a computer game but was unable to develop it because of constraints on his time and limitations in funding. In the negotiations with a large company to produce the game, Tony and the company made several offers and counteroffers(买方提出还价) in order to arrive at a mutually beneficial agreement. ______【48】He agreed to accept their offer if they would concede an additional share of the future revenues. ______【49】Because they continued to negotiate toward a win-win situation , both parties were able to decrease their risk and increase their revenues, sharing in the success of the game. ______【50】In short, both parties won.
A. Although Tony could have become angry about the original offer of $ 12, 000, he made a counteroffer.
B. Effective negotiation helps you to resolve situations where what you want conflicts with what someone else wants.
C. After the terms have been agreed upon, it is much more likely that the relationship will continue to develop with a view to cooperating with each other to insure the continuing success of both parties.
D. The company was very pleased with their return on investment, and Tony was able to launch his own game design company.
E. This, in turn, provides an incentive for the other side to make a similar offer.
F. When the company reviewed his counteroffer, they conceded that he should receive a share and offered slightly less than Tony had proposed.
(46)
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