首页
登录
职称英语
Many experts who favor genetically modified foods believe that genetic engineeri
Many experts who favor genetically modified foods believe that genetic engineeri
游客
2023-09-17
52
管理
问题
Many experts who favor genetically modified foods believe that genetic engineering can help to meet the demands of the world’s increasing population. [br] Among all the GM crops, Bt genes have proved most effective in ______ when the largest reduction in pesticide use has been reported.
选项
答案
cotton
解析
文章里有这样的表述: "of all the crops carrying Bt genes, cotton has brought the biggest drop in pesticide",而后文章里有具体的种植事例来加以证明:根据美国环保署的资料,1999年大量种植Bt棉花的各州,杀虫剂的喷洒量比往常减少了21%。环保署病虫害防治部门的行政人员Johnson说,那个数字“非常戏剧性,让人印象深刻”。通常在一个生长季中,农人要在棉花田里喷洒7~14次杀虫剂,“如果你种的是Bt棉花,你或许只需施用少量刺鼻的化学药剂,甚至根本就用不着了!而对于其他的作物农药用量较少的现象,文章里面的观点是“这两种作物的农药用量本来就比较少,而且它们所遭受的虫害不一定严重。”
转载请注明原文地址:http://tihaiku.com/zcyy/3023008.html
相关试题推荐
Theseexpertswillgiveaseriesofspeciallecturesontheup-to-dateInternet
Somepeoplebelievethatyouhavetobeaspecialkindofpersontosellap
Somepeoplebelievethatyouhavetobeaspecialkindofpersontosellap
AnewpollshowsthatpeoplebelievethatcomputersandtheInternethavema
AnewpollshowsthatpeoplebelievethatcomputersandtheInternethavema
AnewpollshowsthatpeoplebelievethatcomputersandtheInternethavema
Weallbelievethatitishardforhimtotakeupother(responsible)______now.re
Somepeoplebelievethatyouhavetobeaspecialkindofpersontosellap
Somepeoplebelievethatyouhavetobeaspecialkindofpersontosellap
Somepeoplebelievethatyouhavetobeaspecialkindofpersontosellap
随机试题
【B1】[br]【B4】A、roundB、WithinC、backA此句意为“金星就像地球一样围绕太阳运转”。goround意为“绕…转”。
PatientsStruckoffbyGPsA)Thousandsofpatientsarebeing
Ahappymarriagehasbeenshowntolowertherisksofstress-relatedhealth
关于施工准备阶段安全监理,审查施工单位应急预案的说法,错误的是( )。A.总监
古琴有()根弦。A.四 B.五 C.七 D.八
建筑意外伤害保险的保险费应当列入()。<p>A不可预见费<p>B施工企业管理费<
截至2007年上半年末,四直辖市市场主体登记数据中市场主体户数最少的是()
下列哪种行为可以构成玩忽职守罪?A:在安全事故发生后,负有报告职责的人员不报或者
共用题干 甲公司业务如下:①甲公司向乙公司购买一批钢材,甲公司将一张商业汇票背
矿物质又可分为常量元素和微量元素,其特点为以下,但除外A.在体内可以合成,可以在
最新回复
(
0
)