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
2024-02-01
30
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/3412998.html
相关试题推荐
[originaltext]Londontaxidriversknowthecapitallikethebackoftheirh
[originaltext]Londontaxidriversknowthecapitallikethebackoftheirh
[originaltext]Londontaxidriversknowthecapitallikethebackoftheirh
[originaltext]InAmerica,self-improvementisanationalpastime.Everyyea
[originaltext]Foxesandfarmershavenevergotonwell.Thesesmalldog-lik
[originaltext]W:TangLin?M:Yes!W:Pleasesitdown.M:Thankyouverymuch.
[originaltext]W:TangLin?M:Yes!W:Pleasesitdown.M:Thankyouverymuch.
[originaltext]W:I’malittleworriedaboutJill.Shehasgotabadcold,yets
[originaltext]W:I’malittleworriedaboutJill.Shehasgotabadcold,yets
[originaltext]W:I’malittleworriedaboutJill.Shehasgotabadcold,yets
随机试题
Inthe1960s,DouglasMcGregor,oneofthekeythinkersintheartofmanage
下列不属于粉煤灰路堤填筑应符合的规定是( )。A.大风或气温低于0℃时不宜施工
下列叙述错误的是A.距原子核越远的电子,结合力越小 B.结合力与原子序数无关
在固定资产贷款项目评估中,不确定性分析方法通常有盈亏平衡分析和敏感性分析。(
关于寻常疣哪项不正确A.表皮突延长 B.表皮角化过度 C.棘层肥厚 D.成
鉴别消化性溃疡和慢性胃炎的最好方法是:A.便潜血 B.钡餐造影 C.电子胃镜
胰岛β细胞首先合成前胰岛素原,而分泌入血的是A:胰岛素原B:胰岛素的A链及B链
根据《农村土地承包法》,采取转包、出租、互换或者其他方式流转土地承包经营权的,应
男性,48岁。4小时前突然呕血500ml,黑便2次,共500g。既往10年前有“
火灾报警系统由( )合成,是保障隧道安全运行系统中的一个重要子系统。A.人工手动
最新回复
(
0
)