首页
登录
职称英语
[originaltext] Scientists have observed that plants themselves produce many
[originaltext] Scientists have observed that plants themselves produce many
游客
2023-07-16
39
管理
问题
Scientists have observed that plants themselves produce many poisonous chemicals for defense against insects. But insects have developed ways of dealing with them and,in fact,have been eating plants for about 250 million years.Now insects are using these same mechanisms to deal with man-made poisons-insecticide.This is why resistance of insects to insecticide has developed so rapidly.What should be done?Scientists studyilg the problem suggest that farmers use less insecticide.At the moment,famlers regularly spray crops as a precaution against problems that are caused by large numbers of pests.They should,instead,spray only where pests have actually been seen.Secondly,farmers could use a combination of two or three jnsecticide at once.To survive,the insects would need to become resistant to two or more poisons at the same time.The most surprising suggestion,perhaps,perhaps,is that,at certain times of the year,famers should actually try to attract new insects onto the crops they are trying to protect.The new insects will mate with those which survived from a certain kind of insecticide and will lessen the latter’s resistance to it.
Scientists hope that these and other measures will postpone the day when farmers and scientists will have to stand by while new super bugs which may be resistant to all our poisons invade our farms and devour our crops.
选项
A、Changing the way of spraying crops.
B、Buying some outdoor insect lamps.
C、Using a combination of three insecticide.
D、Trying to attract new insects onto the crops.
答案
D
解析
短文提到,应对害虫耐药性最不寻常的建议是,在一年的某些时候尝试吸引别的昆虫来田间,D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2842849.html
相关试题推荐
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]Onewinterdayin1891aclassatatrainingschoolinMassac
[originaltext]Onewinterdayin1891aclassatatrainingschoolinMassac
[originaltext]A"typical"Britishfamilyusedtoconsistofmother,father
[originaltext]M:Thenewmayorisreallyagoodpublicspeaker.Thespeechhed
[originaltext]M:Thenewmayorisreallyagoodpublicspeaker.Thespeechhed
[originaltext]M:Thenewmayorisreallyagoodpublicspeaker.Thespeechhed
[originaltext]M:Thenewmayorisreallyagoodpublicspeaker.Thespeechhed
随机试题
ComeSeptember,thecampusesofAmericawillbeswarmingnotjustwithretu
A、AfterHenryJamesreferredhighlytoher.B、Aftersevenofherpoemswerepubl
John:OhAnne,thatwasawonderfuldinner.That’sthebestmealI’vehadina
Lily所在班级准备后天去沙湖公园野餐。今天下午,她去Mike家通知他参加活动,但他不在.请你以Lily的身份给他留言,主要内容:早上7:30在校门外集合,骑自
某市一房地产开发企业委托建造住宅楼。2018年底建成后,将其中的60%的建筑面积
肺癌常见的症状是A.脓性痰 B.白色泡沫样痰 C.刺激性咳嗽和血痰 D.胸
现行《遥感图像平面图制作规范》规定,地物点平面位置中误差在平地和丘陵地不得大于图
某建设单位准备建一座图书馆,建筑面积5000m2,预算投资400万元,建设工期为
诊断支气管哮喘的主要依据是A.血嗜酸性粒细胞增高 B.有阻塞性通气功能障碍
纳税人未按照规定期限缴纳税款的,税务机关可责令限期缴纳,并从滞纳之日起,按日加收
最新回复
(
0
)