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
A、They become more mature in a shorter time. B、They might be of different genes from their ancestors. C、They are much more nutri
A、They become more mature in a shorter time. B、They might be of different genes from their ancestors. C、They are much more nutri
admin
2017-01-16
19
问题
Until recently, a tomato was just a tomato. But now scientists have begun to change the genes of plants in biology laboratories. So now it is not as easy to know whether tomatoes you eat are pure tomatoes. That is true with many other vegetables and fruits people could find on the market.
Genetic engineering is the process of taking genes from one plant or animal and putting them into an other plant or animal. Scientists use the process to increase the nutrients a food contains. However, this new genetic engineering technology has raised a lot of questions among people.
[21]The United States Food and Drug Administration (FDA) is responsible for deciding how foods must be described when they are sold to the customers. The FDA says people who buy human foods produced by new kinds of plants must be told if there are any safety problems. It also says people must be told what nutrients the foods contain.
There are, however, times when more information about a new food product would be helpful to certain people. Some foods are not a safety threat, but do bring effects to people in unusual ways. For example, [22]after eating the food, they may develop red spots on their skin in a few hours, or have trouble in breathing or have a sick stomach.
20 In what way might fruits and vegetables nowadays be different from those before?
21 What is the FDA responsible for deciding?
22 What may happen to people after eating certain food?
选项
A、They become more mature in a shorter time.
B、They might be of different genes from their ancestors.
C、They are much more nutritious with better taste.
D、They might take a totally different look than before.
答案
B
解析
短文开篇即介绍现在的西红柿未必是以前人们所食用的西红柿。而很可能是实验室的转基因产品;接着说市面上许多蔬菜水果的情况也是如此。B是对原文change the genes of plants的同义改写,故选B。
转载请注明原文地址:https://kaotiyun.com/show/obi7777K
0
大学英语四级
相关试题推荐
A、Thejobmarket.B、Theirformerschools.C、Goodschools.D、Thelocalhighschoolorcolleges.D细节题。文中提到许多人在当地的高中或大学上夜校,接受成人教育。
Forthispart,youareallowed30minutestowriteanessayentitledTheProsandConsofDormitoryLife.Youshouldwriteatle
Everyyear,earthquakesareresponsibleforalargenumberofdeathsandvastamountofdestructioninvariouspartsoftheworl
PerhapsbecausegoingtocollegeissomuchapartoftheAmericandream,manypeoplegoforno【B1】______reason.Somegobecause
Forcenturies,boysweretopoftheclass.Butthesedays,that’snolongerthe【C1】______.AnewstudybytheOECD,examined
Sushi(寿司)isnolongerthesolepreserveoftheadventurousdiner.Thesedays,grabbingapackforlunchisalmostascommonasp
Forthispart,youareallowed30minutestowriteaneye-witnessaccountofatrafficaccident.Youshouldwriteatleast120w
A、Thewomanisconfidenttoimprovestudents’psychologicalproblems.B、Thewomanisapsychologist.C、Themanseemstohavepsy
A、Shecan’tdecidewhethertolivehere.B、Sheistotallysatisfiedwiththeapartment.C、Shewillnotrenttheapartment.D、She
A、Workhardontheproject.B、Leavetheprojectalone.C、Discussabouttheprojectwiththeprofessor.D、Asktheprofessorfora
随机试题
一定存在三方不同当事人的票据关系的是_______。
热带季雨林区的年降雨量约为
糖尿病是一组以高血糖为特征的代谢性疾病。高血糖则是由于胰岛素分泌缺陷或其生物作用受损,或两者兼有引起。糖尿病时长期存在的高血糖,导致各种组织,特别是眼、肾、心脏、血管、神经的慢性损害、功能障碍。准许为2型糖尿病儿童患者选用的口服降糖药是
王某在北京万众丰田4S销售店购买了一台RAV4轿车,使用3个月后就听说在北美市场上出售的同类车型的刹车系统存在问题,遂到相关部门进行检测,证明该车的刹车系统确实存在着一定的安全隐患,下列相关说法正确的是:()
用于评估基准地价的数据样本数量,要满足数理统计要求,样本数量不足时,可采用()方法,以保证样本数据量符合基准地价评估的需要。
齿轮传动机构()装置全封闭型的防护装置。
(2002年真题)图书重印前必须()。
1931年,一位给人们带来光明的科学家重病的消息牵动着世界人民的心,几十名记者为他守夜,每隔一个小时就对外发布一次消息——“灯”还亮着。这位科学家是()。
OneafternoonIwassittingatmyfavoritetableinarestaurant,waitingforthefoodIhadordered.SuddenlyI【36】thatamansit
Theresathinksthatthepresentgovernmentis______.
最新回复
(
0
)