题目内容
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Sugar cane was first introduced into Spain in ______.
A．A.D.703
B．A.D. 755
C．AD.1150
D．A.D. 1419
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更多“Sugar cane was first introduced into Spain in ______.A．A.D.703B．A.D. 755C．AD.1150D．A.D. 14”相关的问题
From this passage, it appears that sugar cane was first grown in ______.
A．Europe
B．the Orient
C．Arabia
D．Sicily
A.Sugar
B.Sugar cane
C.Bananas
D.Pineapples
Sugar cane grows best ______.
A．in mountainous areas
B．along the coast
C．in valleys
D．in coral islands
What is happening to Barbados's sugar industry？
A．It is prosperous and stable.
B．It has vast expanses of deserted cane fields.
C．It uses cane fields as tourist attractions.
D．It stopped growing sugar 30 years ago.
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 programs, 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’ s sugar, has coordinated an international project under professor Paulo Arrudo of the Universidade Estaudual De Campinas in Sao Paulo. 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. Scientists believe they will eventually be able to grow a plant which cannot be destroyed by rust.
A. The majority of the world’s sugar now comes from this particular commercial species.
B. Unfortunately, however, the plant started to become weaker and more prone to disease.
C. 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. Since the 1960s, scientists have been analyzing the mysteries of the sugar cane’s genetic code.
E. One major gene has been identified by Dr Angélique D’Hont and her team in Montpelier, France.
F. Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.
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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)＜br＞
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 and more profitable.＜br＞
__________ (47) Many crops withered(枯萎)and died, despite growers&39; attempts to save them, and there were fears that the health of the plant would continue to deteriorate.＜br＞
In the 1960s, scientists working in Barbodos looked for ways to make the commercial species stronger and more able to resist disease. They experimented with breeding programmes, mixing 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.＜br＞
__________(49) Brazil, which produces one quarter of the world&39;s sugar, has coordinated an international project under Professor Paulo Arrudo of the Universidade Estaudual de Campinas in Sao Paulo. 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.＜br＞
Despite all the research, however, we still do not fully understand how the genes function 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. Scientist believes they will eventually be able to grow a plant which cannot be destroyed by rust.
第46题___________ 查看材料
A.Eventually， a commercial plant was developed which was 5 percent sweeter than before，but also much stronger and less likely to die from disease.
B.One major gene has been identified by Dr Angelique D"Hont and her team in Montpelier，France.
C.Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.
D.Since the 1960s， scientists have been analyzing the mysteries of the sugar cane"s genetic code.
E.The majority of the world"s sugar now comes from this particular commercial species.
F.Unfortunately， however， the plant started to become weaker and more prone to disease.
___________ 查看材料
A.Eventually， a commercial plant was developed which was 5 percent sweeter than before，but also much stronger and less likely to die from disease.
B.One major gene has been identified by Dr Angelique D"Hont and her team in Montpelier，France.
C.Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.
D.Since the 1960s， scientists have been analyzing the mysteries of the sugar cane"s genetic code.
E.The majority of the world"s sugar now comes from this particular commercial species.
F.Unfortunately， however， the plant started to become weaker and more prone to disease.
Why did the farmers become desperate in the mid 30s？
A．Their houses were destroyed by cane beetles.
B．Cane beetles dropped their eggs onto the ground around the base of the plant.
C．Cane beetles killed all their livelihood.
D．Their sugar cane plants were ruined by overwhelming beetles.
Hernando Cortez has done the following except for______.
A．grasping the commercial possibilities of the New World offerings
B．making Mexico a colony of Spanish
C．sweetening the original cocoa bean concoction with cane sugar
D．processing the cocoa beans in a more efficient way
Trinidad and Tobago is a single country composed of two islands.. Trinidad, with the majority of the country's 900,000 inhabitants, is a rectangle of roughly fifty by forty miles. Tobago, nineteen miles to the north, is smaller and has a population of about 35,000.
Situated at the end of the long chain of Windward and Leeward Islands, Trinidad is at one point only seven miles off the coast of Venezuela. Its geology, flora, and fauna are similar to those of the South American mainland. Like Venezuela, the backbone of Trinidad and Tobago's economy is petroleum and its first colonists were Spaniards.
Three mountain ranges, with summits of up to 3,000 feet, cross Trinidad from east to west, while Tobago is a relatively flat coral island, rimmed with fine beaches. The broad plains between Trinidad's mountain ranges are dominated by vast fields of sugar cane that present a symmetrical green pattern when seen from the air. A closer inspection reveals the coconut plantations along the coast and the profusion of brilliant red and yellow flowers of various species that are found all over the island. Houses on both islands tend to be light-colored, with an open style. of architecture, in many cases with open space under the entire dwelling. Port-of-Spain, the capital, is a bustling modern city where the pulse of the people reflects Britist, Spanish, and East Indian influences.
The title below that best expresses the main idea of this passage is ______.
A．Trinidad and Tobago, A Young Country
B．Two Islands
C．Trinidad's Attraction to Tourists
D．Sugar Cane Production
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