首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
共用题干 The Tough Grass that Sweetens Our LivesSugar cane was once a wild grass...
共用题干 The Tough Grass that Sweetens Our LivesSugar cane was once a wild grass...
admin
2020-12-24
49
问题
共用题干
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 and 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 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.
_________(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 interna-
tional 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.__________(50)This gene is particularly exciting because it makes the plant resistant to rust,a dis-
ease which probably originated in India,but is now capable of infecting sugar cane across the world.Scien-
tists believe they will eventually be able to grow a plant which cannot be destroyed by rust.
选项
__________(48)
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 analysing the mysteries of the sugar cane's genetic code.
E:One major gene has been identified by Dr Angelique 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.
答案
C
解析
前一句话提到,甘蔗成了一种非常有价值的商业作物,在世界范围种植起来。因此这 句话应该是讲种植甘蔗成了获得糖的主要来源。故选A。
前面一句说由于对糖需求的增加,种植甘蔗这一行业也得以壮大并且获利更多。后面 一句提到,很多甘蔗作物枯萎并且死掉,尽管种植者试图去救治它们,大家还是担心甘蔗的健 康状况会持续恶化。所以中间的句子应该是承接的转折句。故选B。
前面讲到,科学家们正在寻找一种能使商业型甘蔗更强壮、抗病性更高的方法。他 们实验把野生甘蔗的基因和商业用甘蔗的基因相结合。后面一句讲这种类型的甘蔗还没有 开始商业化地出售。由此可知,中间的句子应该是讲将研发的这种商业型甘蔗的特点。故 选C。
该句位于段首应该是主题句。根据后面的内容该段主要讲,巴西这个甘蔗生产大国和 一位教授合作来研究在甘蔗的基因结构中,哪一部分对生产糖最重要以及甘蔗整体的健康状 况。故选D,意思是“从二十世纪六十年代起,科学家们就开始分析甘蔗基因的神秘性。”
前一句讲,尽管做了这么多的研究,但是我们仍不清楚甘蔗的基因情况。后一句开头说“这一基因之所以独特地存在是因为······”,这里提到的这一基因(this gene)应该是新发现 的。故选E。第6部分:完形填空
转载请注明原文地址:https://ti.zuoweng.com/ti/asdQKKKQ
相关试题推荐
共用题干 资料:王太太从事个体服装销售近20年,前一段时间,她刚参加了国家的社会养老保险,但是她对国家举办的国家社会养老保险不是很明白;于是她向理财规划...
共用题干 赵先生现年35岁,2年前离异,自己一人带着4岁的儿子一同生活。目前任职于某国企中层领导岗位。每月工资税后8000元,年终各种福利和奖金税后共8...
共用题干 袁先生与李女士刚刚结婚,组建家庭。其中,袁先生,28岁,每年的年收入为5万元;李女士,28岁,每年的年收入为3万元,每月还可以获得投资收入50...
共用题干 袁先生与李女士刚刚结婚,组建家庭。其中,袁先生,28岁,每年的年收入为5万元;李女士,28岁,每年的年收入为3万元,每月还可以获得投资收入50...
共用题干 夏某夫妇计划于明年生育一个宝宝,请理财规划师为其调整家庭的风险管理和保险规划。根据案例回答6~9题。夏太太的朋友计划届时为自己的孩子购买和夏太太孩子
共用题干 夏某夫妇计划于明年生育一个宝宝,请理财规划师为其调整家庭的风险管理和保险规划。根据案例回答6~9题。夏某夫妇的孩子平安出生后,在活泼好动的中小学阶段
共用题干 夏某夫妇计划于明年生育一个宝宝,请理财规划师为其调整家庭的风险管理和保险规划。根据案例回答6~9题。目前,夏先生有很好的社会保障,但夏太太没有社会保
共用题干 龚建柱是某中学教师,30岁,每月税后收入4000元,年终奖金10000元;龚太太是某公司文秘,25岁,每月税后收入3000元。(1)家庭资产负...
共用题干 龚建柱是某中学教师,30岁,每月税后收入4000元,年终奖金10000元;龚太太是某公司文秘,25岁,每月税后收入3000元。(1)家庭资产负...
共用题干 唐先生夫妇都是国有企业中层管理人员,二人均为45岁,家庭年收入总额为税后300000元。他们有一个刚上大学的儿子,生活已经基本独立。家中具有银...
随机试题
老年人的特征是皮下脂肪减少,皮肤颜色变深、变粗糙、变松弛,皱纹也越来越深,面部骨骼凹凸明显。()A、正确B、错误A
良性胃溃疡的X线征象中,不包括 A.项圈征 B.黏膜线 C.狭颈征 D.
案例五: 一般资料:求助者,女性,35岁,全职妈妈。 案例介绍:求助者的儿子
在商业银行公司贷款业务中,法人商业用房按揭贷款的用途有( )。
根据我国刑法,下列可能构成操纵证券、期货市场罪的情形有()。
简述集体协商与平等协商的区别。
尸体料理时,头下垫枕的目的是
下列对基尼系数的叙述不正确的是()。 A.经济学家们通常用基尼系数来表现一个国家和地区的财富分配状况。这个指数在O和1之间,数值越高,表明财富在社会成员...
关于分娩机制,下列说法错误的是A、经产妇多在分娩开始后胎头衔接B、经产妇衔接与下降同时进行C、俯屈使胎头入盆径线由枕下前囟径变为枕额径D、初产妇可在
投资者的评估结果有效期最长不得超过3年。募集机构逾期再次向投资者推介私募基金时,需重新进行投资者风险评估。()私募基金产品的投资者持有期间超过()...