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
专升本
Scientists were embroiled (使卷入) last week in an international row over genetically modified cotton (GM cotton). A study in C
Scientists were embroiled (使卷入) last week in an international row over genetically modified cotton (GM cotton). A study in C
admin
2011-03-26
34
问题
Scientists were embroiled (使卷入) last week in an international row over genetically modified cotton (GM cotton).
A study in China suggested for the first time that the crop was permanently damaging the environment and that insects were building up resistance to it.
The study, by the Nanjing institute of Environmental Science, combined the laboratory and field work from four Chinese scientific institutes. The study was done over a several - year period.
GM Cotton had a gene resistance to the cotton bollworm (棉铃虫) and isolated from the bacterium (细菌) named Bacillus thuringiensis (Bt), but the study found that it harms the natural parasitic (寄生的) enemies of the cotton bollworm.
It also indicated that populations of pests besides the bollworm had increased in Bt cotton fields and some had replaced the bollworm as the primary pest.
However, the leading GM company, the US’s Monsanto, which controls more than 80 per cent of the Bt cotton grown worldwide, dismissed the research.
It said that the industry has always cited GM cotton as its biggest success, because it can increase yields by up to 60 per cent and reduce the need for pesticides (杀虫剂) by 80 per cent.
But, unfortunately for the industry, (80)
the scientists also found that the resistance of Bt cotton to bollworm decreased significantly over time.
The world "yields" (line 13) means ______.
选项
A、plants
B、giving up
C、establishment
D、productions
答案
D
解析
根据上下文,可以推断出GM棉花可以增加60%的产量,所以yields的意思相当于D。
转载请注明原文地址:https://kaotiyun.com/show/HvvC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
It______thepostofficetimeifpeopleaddresslettersproperly.
Accordingtotheauthor,feelingdepressedis______.Thephenomenonthattoday’schildrenseemadult-likeisattributedbythe
Youcouldscarcelyhavefoundabetterpersonforthejob______Mr.Lee.
IwishI______youyesterday.
Theauthor’spurposeinwritingthispassageistotell______.Duringtheteenageyears,oneshouldlearnto______.
Sheiscompletely______(depend)andreceivesnomoneyfromherfamily.
WhatwasthehightemperatureinColumbus,OhioonDecember12?Howmanycitieshadatemperaturebelow0°sometimesduringthe
InGuangzhou,capitalofSouthChina’sGuangdongProvince,GuangzhouBaiyunInternationalAirportresumeditsinternationalflig
Thepoorareverywonderfulpeople.Oneeveningwewentoutandwepickedupfourpeoplefromthestreet.Andoneofthemwasin
Television—thatmostattractivemoderntechnology,markedbyrapidchangeandgrowth—ismovingintoanewerawhichpromisesto
随机试题
进行酸液对钢片腐蚀速率的测定,酸化前钢片质量m1为10.5355g,反应时间为48h,酸化前钢片表面积S为0.001.2m2,酸对钢片的腐蚀速率为0.338g/(m2.h),求酸化后钢片质量。
与系统性红斑狼疮(SLE)的临床表现不符的是
______isadocumentgrantedbythecustomsauthoritieswhichallowsavesseltostartunloadinggoods.
适于汽车运输易腐食品用保温集装箱(规格为40英尺,壁面为钢制)
下列情况中,行政复议机关可以决定驳回行政复议申请的有()。
俄国著名教育家乌申斯基曾说,要及时“巩固建筑物”,而不要“在建筑物崩溃之后才去补修”,这句话所要强调的是()。
关于师生关系的理论中,儿童中心论的代表人物是()。
社会监督可以直接产生法律后果,具有法律上的强制性。()
一、注意事项1.本题本由给定资料与作答要求两部分构成。考试时限为150分钟。其中.阅读给定资料参考时限为40分钟,作答参考时限为110分钟。满分100分。2.监考人员宣布考试开始时。你才可以开始答题。3.请在题本、答题卡指定位
Wewalkedsoquietlythatthenurseatthedeskdidn’tevenlifthereyesfromthebook.Mumpointedtoabigchairbythedoor
最新回复
(
0
)