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
36
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.
【C3】
选项
答案
G
解析
上一句说到“科学家尝试不同的育种, 用更微妙的商业型甘蔗基因进行混合”, 下一句说到“这种甘蔗还没有准备好进行商业销售”。由此可知, 空格处应是科学家培养出了一个新品种的甘蔗, 选项F与上下文联系最紧密, 故选G。
转载请注明原文地址:https://kaotiyun.com/show/MDNd777K
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
Laborforceisdefinedasbeingthetotalnumberofpeoplewhoareavailabletoworkandearnincome.Thisdefinitionincludese
Laborforceisdefinedasbeingthetotalnumberofpeoplewhoareavailabletoworkandearnincome.Thisdefinitionincludese
LGElectronicsInc,theworld’sNo.3mobilephonehandsetmaker,saidonTuesdaythatithad【C1】______pickedto【C2】______third-
Readthefollowingparagraphsinwhichfivepeopletalkabouthappiness.Forquestions61to65,matchthenameofeachspeaker
Readthefollowingparagraphsinwhichfivepeopletalkabouthappiness.Forquestions61to65,matchthenameofeachspeaker
Whereisthisconversationprobablytakingplace?
Wheredoestheconversationprobablytakeplace?
Scientistsfindthathard-workingpeoplelivelongerthanaveragemenandwomen.Careerwomenare【C1】______thanhousewives.Evid
Whatdoesthetelegramsay?
随机试题
语言发展演变的原因有哪些?
良恶性骨肿瘤均只采用手术治疗。
下面引起高钾血症的病因中哪项是不正确的
用湿黏土、红黏土和中、弱膨胀土作为填料直接填筑时,应符合()。
北京最古老的商业街是()
2009年对外直接投资额排名第三的国家,其2006—2009年间对外直接投资额的年均增长率约为:
简述带状疱疹的临床表现。
设α1,α2,α3,β1,β2都是四维列向量,且|A|=|α1,α2,α3,β1|=m,|B|=|α1,α2,β2,α3|=n,则|α3,α2,α1,β1+β2|为().
情景:你被纽约大学录取。两周后要去美国读书。机票已预定好。你在纽约有一个好朋友叫Jack。任务:请你用英语给他写一封50词左右的短信。内容包括:.你为什么去纽约。.你何时到达纽约。.希望他做什么。短信写在主观题答题卡上该题的序号后。请用下
•Lookatthechartsbelow.TheyshowthesalesofcarsindifferentshopsduringMay,JuneandJuly.•Whichchartdoeseachse
最新回复
(
0
)