首页
登录
职称英语
What conclusion can be drawn from the scientists’ observation? [br] [originalte
What conclusion can be drawn from the scientists’ observation? [br] [originalte
游客
2024-10-16
48
管理
问题
What conclusion can be drawn from the scientists’ observation? [br]
Scientists have discovered 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-madepoisons--insecticides. This is why resistance of insects to insecticides has developed so rapidly.
What should be done? Scientists studying the problem suggest that farmers use less insecticides. At the moment, farmers 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 insecticides at once. To survive, the insects would need to become resistant to two or more insecticides at the same time.
The most surprising suggestion, perhaps, is that at certain times of the year, farmers should actually try to attract 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.
Scientist 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 poisons invade our farms and devour our crops.
选项
A、Insects are the most adaptable creatures.
B、Insects would be out of control if nothing were done about the current situation.
C、Insects will someday devour all plants on the Earth.
D、Insects have developed resistance to both botanical and artificial poi- sons rapidly.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3804165.html
相关试题推荐
Whatconclusioncanbedrawnfromthescientists’observation?[br][originalte
Whatconclusioncanbedrawnfromthescientists’observation?[br][originalte
Whatconclusioncanbedrawnfromthescientists’observation?[originaltext]
Whatdothemanandthewomantalkabout?[br][originaltext]W:Birdwatching!
Whatdothespeakersmainlydiscuss?[originaltext]S:I’msorry.Ijustdon’tag
Whoishurtbyairpollution?[br][originaltext]TheWorldBanksaysairp
Whoishurtbyairpollution?[originaltext]TheWorldBanksaysairpolluti
Whatcanbeinferredfromthenews?[originaltext]PoliceinSpainsaythat
Whatisthetalkmainlyabout?[originaltext]Itiscommonknowledgethatmu
What’stheconversationmainlyabout?[br][originaltext]M:Ijustlearnedfrom
随机试题
Salesmendependupontheperson-to-personapproachintryingtopersuadecon
Thecomputerrevolutionmaywellchangesocietyas______asdidtheIndustrial
[originaltext]M:Soyouaregoingtobewritingfortheschoolnewspaper?W:Ye
Whatisthequestionthespeakertriestoanswer?Howto______inajobintervie
建立以美术教师自评为主,( )等共同参与的评价制度。A.自评、他评、教师评、座
以下选项均是由四个三角形和三个正方形组成,无法折叠成左图所示立体图形的是: A
若2016年1月网购固定篮子价格指数为100,则当年12月该指数约为:A
某学校开发了一门介绍当地风俗产物与人物的课程,该课程属于()。A.地方课程
在建设工程进度监测过程中,定期收集进度报表资料情况属于()的主要方式。A.
医疗机构的责任疫情报告人是A.感染科科长 B.院长 C.主管医师 D.专门
最新回复
(
0
)