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
2023-11-23
68
管理
问题
What conclusion can be drawn from the scientists’ observation? [br]
Scientists have discovered that plants themselves pro- duce 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--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 at-tract 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 poisons rapidly.
答案
B
解析
“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.”,从这句话我们可以看出如果不对目前的形式采取措施,迟早有一天,害虫们将会失去控
转载请注明原文地址:https://tihaiku.com/zcyy/3211558.html
相关试题推荐
[originaltext]I:Goodevening,everybody.Inthisshow,wearegladtohaveAli
[originaltext]I:Goodevening,everybody.Inthisshow,wearegladtohaveAli
[originaltext]I:Goodevening,everybody.Inthisshow,wearegladtohaveAli
[originaltext]I:Goodevening,everybody.Inthisshow,wearegladtohaveAli
[originaltext]M:However,itisimpossibleforstudentstoexpecttoearnsuffi
[originaltext]M:However,itisimpossibleforstudentstoexpecttoearnsuffi
[originaltext]I:Hello,everyone.TodaywearegreatlyhonoredtohaveMr.Malc
[originaltext]I:Hello,everyone.TodaywearegreatlyhonoredtohaveMr.Malc
[originaltext]I:Hello,everyone.TodaywearegreatlyhonoredtohaveMr.Malc
[originaltext]I:Hello,everyone.TodaywearegreatlyhonoredtohaveMr.Malc
随机试题
WhatdidMr.Jonesaskthestudentstodo?Mr.Jonesaskedthestudentstowrite
做好存量房买卖合同风险防范需要做到的事项有( )。A.房屋图纸与结构的确认
发动“文化大革命”的纲领性文件是()。A.《五一六通知》 B.《评新编历史
患者,女性,23岁。使用青霉素10天后出现发热、关节肿痛、荨麻疹、全身淋巴结肿大
(1)每个人都有巨大的潜能。(2)纵观学业有成、事业有成的人,他们有一个共同点
省、自治区、直辖市人民政府确定的镇人民政府在城乡规划实施管理中具有依法核发(
(2017年真题)下列关于福费廷业务的特点的表述,正确的有()。A.银行(
(2019年真题)宜选用黄连上清丸的是( )A.某男,34岁,因胃肠积热而头痛
来源于蔷薇科,表面颜色紫红色或红棕色的是A.巴豆 B.枳壳 C.槟榔 D.
某工业项目固定资产投资3000万元,流动资产为1500万元,其中资本金占项目总投
最新回复
(
0
)