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
2024-09-28
21
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 post-pone the day when farmers and scientists will have to stand by while new super-bugs which may be resistant to all poi-sons 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/3778248.html
相关试题推荐
Thethreesuicidebombingsoccurredin______.[originaltext]Itgoesagainst
WherewillIraqiPrimeMinisterdeliveraspeechonTuesday?[br][originaltext
WherewillIraqiPrimeMinisterdeliveraspeechonTuesday?[originaltext]I
Thedemonstratorsdemanded______.[originaltext]About1,000supportersof
Whichofthefollowingistrueaboutthenewsitem?[originaltext]Theauthor
WhatiscommontoallthefilmsproducedinHollywood?[br][originaltext]
Themanislookingfor______[br][originaltext]M:Excuseme,Iwonderifyouc
Themanislookingfor______[originaltext]M:Excuseme,Iwonderifyoucouldt
Whattopicarethemanandwomandiscussing?[originaltext]M:Ireallyappreciat
Thenewsitemmainlyabout[br][originaltext][29]Manyorganizationsarou
随机试题
WhichofthefollowingsentencesisINCORRECT?A、Hereissuchabigstonethatno
AfterJane’shusbanddied,shesufferedagooddealof______overtheyears.A、u
美元标价法即以若干数量()来表示一定单位美元的价值的标价方法,美元与非美元货币的汇率作为基础,其他货币两两间的汇率则通过套算而得。A、人民币B、欧元
Theairlinepilotstoldthepassengers(不要紧张,系好安全带)____________.tofastentheir
男孩,5岁。自幼食欲奇佳,不爱活动致体态肥胖,身材高大,智力正常,诊断为单纯性肥
Whatshouldtheteachertrytoavoidwhe
男性患者,40岁,吊车驾驶员,今日因花粉过敏就诊,下列药物最适合其服用的是A.苯
对严重、罕见或新的ADR病例要用有效方式快速报告,最迟不超过A:5个工作日 B
经检查票面正确,评议人在操作票备注栏内右下角加盖(____)评议章并签名。已执行
下列项目社会评价内容中,不属于社会互适性分析因素的是()。A.不同利益相关
最新回复
(
0
)