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
24
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:https://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
(1)Criminologyhastreatedwomen’sroleincrimewithalargemeasureofind
A.天王补心丹 B.酸枣仁汤 C.磁朱丸 D.甘麦大枣汤 E.朱砂安神丸
人工智能是指由人工制造出来的系统所表现出来的智能。人工智能的核心问题包括推理、知
①用小小的木制手织机,固定在房角一柱上,一面伸出憔悴的手来 ②做母亲的全按照一
防止COPD发生发展的重要措施是( )。A.戒烟 B.抗菌药预防 C.控制
Questions69-71refertothefollowingl
工程保险的特征不包括()。A:保险金额具有不变性B:保障具有综合性C:风险的
如果将货物从N个仓库移动到M个商店,每个商店都有固定的需求量,因此需要确定由哪个
腹外疝嵌顿是指A.并发休克的腹外疝 B.内容物与疝囊粘连的腹外疝 C.所有不
按照国际通用的预警信号颜色表示,安全状况为“受到事故的严重威胁”时,预警信号颜色
最新回复
(
0
)