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
The Tough Grass That Sweetens Our Lives Sugar cane was once a wild grass that grew in New Guinea and was used by local peopl
The Tough Grass That Sweetens Our Lives Sugar cane was once a wild grass that grew in New Guinea and was used by local peopl
admin
2014-02-28
24
问题
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. 【B1】______
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. 【B2】______
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 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.【B3】______This sugar cane is not yet ready to be sold commercially, but when this happens, it is expected to be incredible profitable for the industry.
【B4】______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. 【B5】______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 believe they will eventually be able to grow a plant which cannot be destroyed by rust.
A. Since the 1980s, scientists have been analysing the mysterious of the sugar canes genetic code.
B. Unfortunately, however, the plant started to become weaker and more prone to disease.
C. The majority of the world’s sugar now comes from this particular commercial species.
D. One major gene has been identified by Dr. Angellique D’Hont and her team in Montpeller, France.
E. Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.
F. Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.
【B5】
选项
答案
D
解析
空格后讲到这一基因尤其令人兴奋,因此,空白处应是跟基因相关的内容,在剩下的选项中,只有D项“Angellique D’ Hont博士和她的团队发现了一个重要基因”符合文意。
转载请注明原文地址:https://kaotiyun.com/show/IpQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
ABiologicalClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalclo
ABiologicalClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalclo
TeachingandLearningMedicineAwardTwoscientistswhohavewonpraiseforresearchintothegrowthofcancercellscouldb
HowTwoGreatConflictsHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedt
AdaptationofLivingThingsCertainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbe
13.Thepolicecontendedthatthedifficultiestheyfacedweretoosevere.
In1861itseemedinevitablethattheSouthernstateswouldbreakawayfromtheUnion.
IfRepublicanshopetowinin2012,they’dbetterstopactinglikedisheveledDemocrats.
Shegetsaggressivewhensheisdrunk.
随机试题
国家权力机关的监督是()对公安机关及其人民警察执法活动的监督。
行车中,发现行人突然横过道路时,应迅速减速避让。
从自控系统的基本组成环节来看,开环控制系统和闭环控制系统的区别在于()。
试述辩证否定观的内容,并用以说明应怎样对待我国传统文化和外国文化。
慢性骨髓炎的手术治疗目的,下列正确的是
A.多汗、易惊、颅骨轻度软化、血钙、血磷轻度下降,碱性磷酸酶轻度上升B.方颅,明显的串珠或"手镯"、血钙、血磷明显下降,碱性磷酸酶明显上升C.无易惊、多汗,血钙、血磷回升,碱性磷酸酶下降D.无易惊、多汗,仅遗留不同程度的骨骼畸形,血生化正常E.睡眠
磺酰脲类药物药理作用为
锐缘进口的圆柱形外管嘴的正常工作条件是()。
下列说法中正确的有( )。若注册会计师经过实施有关实质性测试后,仍认为与某一重要账户的认定有关的检查风险不能降至可接受的水平,应发表( )。
设y=f(x)为区间[0,1]上的非负连续函数.证明存在c∈(0,1),使得在区间[0,c]上以f(c)为高的矩形面积等于区间[c,1]上以y=f(x)为曲边的曲边梯形的面积;
最新回复
(
0
)