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
53
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
Inthesimplestterms,amarketistheplacewheresellermeetsbuyertoexc
220/380V低压架空电力线路接户线,在进线处对地距离不应小于多少m?A.2.
在对某类反光膜逆反射系数测试多次之后所得结果与该类型反光膜标准规定值之差称为随机
下列教学目标属于“过程与方法”范畴的是()。A.知道化学式研究物质的组成、结构、
以下关于“具有中国特色国际领先的能源互联网企业”中“具有中国特色”的描述,不正确
房地产市场的运行环境中,( )涉及资本的安全性,是投资者最敏感的问题之一。A.
公共服务设施规划布局采用的方式有()。A.分散布局 B.集中布局 C.
劳动法的首要原则是()A:保障劳动者的劳动权 B:劳动关系民主化 C:物质帮
下列关于行政许可实施程序中的听证程序的表述,错误的有()。A、行政许可直接涉及申
2021年7月1日,习近平总书记在庆祝中国共产党成立100周年大会上的讲
最新回复
(
0
)