首页
登录
职称英语
[originaltext] Until recently, a tomato was just a tomato. But now scientist
[originaltext] Until recently, a tomato was just a tomato. But now scientist
游客
2023-06-30
86
管理
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://tihaiku.com/zcyy/2796732.html
相关试题推荐
[originaltext]Asthecarindustrydevelops,trafficaccidentshavebecomeasfa
[originaltext][19]Aroundtheyear1000AD,somepeoplefromnorthwestIndiabe
[originaltext]M:[13]It’sChineseNewYear’sEvetonight.Let’sgoandwatcha
[originaltext]M:[13]It’sChineseNewYear’sEvetonight.Let’sgoandwatcha
[originaltext]M:[13]It’sChineseNewYear’sEvetonight.Let’sgoandwatcha
[originaltext]W:Goodafternoon.CanIhelpyou?M:Yesplease.I’mlookingfo
[originaltext]W:Goodafternoon.CanIhelpyou?M:Yesplease.I’mlookingfo
[originaltext]W:Goodafternoon.CanIhelpyou?M:Yesplease.I’mlookingfo
[originaltext]M:Canyoutellmethetitleofthisoilpainting?W:Sorry,Id
[originaltext]M:Canyoutellmethetitleofthisoilpainting?W:Sorry,Id
随机试题
Formorethantwocenturies,American’scollegesanduniversitieshavebeen
Aswehaveseen,thereisnothingaboutlanguageassuchthatmakeslinguis
影响保额损失率的因素包括保险事故发生的频率、保险事故的损失率、保险标的损毁程度、
心电图同一导联的室性期前收缩偶联间期不恒定,可见室性融合波:A.室性期前收缩二
工程项目进度执行情况的综合描述,不包括()。'A、报告的起止期 B、原定目标
患者,男性,78岁。卧以头高足低位,此时导致压疮发生的力学因素主要是A.水平压力
地西泮是镇静催眠药,属于A、巴比妥类 B、非巴比妥非苯二氮卓类 C、吩噻嗪类
观察下图,选择最合适的一个填入问号处,使之呈现一定的规律性:
(2018年真题)证券公司介绍其控股股东、实际控制人等开户的,证券公司应当将其期
(2018年真题)根据支付结算法律制度的规定,下列票据中,出票人为银行的是()
最新回复
(
0
)