首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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
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
admin
2022-06-05
227
问题
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.【C1】________.
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.【C2】________ Many crops withered (枯萎)and died, despite growers, attempts to save them, and there were fears that the health of the plant would continue 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.【C3】________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.
【C4】________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 function in sugar cane.【C5】________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] Unfortunately, however, the plant started to become weaker and more prone to disease.
[B] Sugar cane was now much vigorous and the supply of sugar is therefore more guaranteed.
[C] One major gene has been identified by Dr Angelique D’Hont and her team in Montpelier, France.
[D] The majority of the world’s sugar now comes from this particular commercial species.
[E] Since the 1960s, scientists have been analysing the mysteries of the sugar cane’s genetic code.
[F] The sugar cane’s genetic code has been found by a farmer in 1950.
[G] Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.
【C4】
选项
答案
B
解析
上一句讲到这种甘蔗还不能大量出售, 但一旦能够出售, 将会产生难以置信的利润;下一句说到“巴西出产世界食糖的1/4。它已经在位于圣保罗的坎皮纳斯大学的保罗.阿鲁多教授的负责下, 发起一项国际合作项目”。由此可知, 空格处应是讲这种甘蔗的现状和优势, 科学家才研究它的基因, 选项B与上下文联系最紧密, 故选B。
转载请注明原文地址:https://kaotiyun.com/show/gDNd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Whereisthisconversationprobablytakingplace?
Astheconversationbegins,whatarethemanandwomandoing?
Astheconversationbegins,whatarethemanandwomandoing?
Wheredoesthisconversationmostprobablytakeplace?
Scientistsfindthathard-workingpeoplelivelongerthanaveragemenandwomen.Careerwomenare【C1】______thanhousewives.Evid
Scientistsfindthathard-workingpeoplelivelongerthanaveragemenandwomen.Careerwomenare【C1】______thanhousewives.Evid
Whatdoesthetelegramsay?
Whatdoesthetelegramsay?
Whatdoesthetelegramsay?
随机试题
我国标准规定下列需每年检定的项目的是
高处坠落患者出现下列情况,需要优先处理的是
有关酶原激活的概念,正确的是
下列叙述中,符合阿司匹林的是()。
屋面防水层施工的气候条件合适的是:(2012年第64题)
华北地区的某高层公共建筑,地下3层、地上7层,建筑高度35m,总建筑面积70345m2。建筑外墙采用玻璃幕墙,其中地下总建筑面积28934m2,地下一层层高6m,为仓储式超市(货品高度3.5m)和消防控制室及设备用房;地下二、三层层高均为3.9m,为汽
在财产清查中填制的“账存实存对比表”是()。
不宜作为查账立案结论依据的纳税检查方法是()。
非正式群体
A、Bymercilesslyexploitingwomenworkersintheclothingindustry.B、Bythegreateffortofthefashiondesigners.C、Bypaying
最新回复
(
0
)