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
2023-11-06
29
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/3163684.html
相关试题推荐
Betweenwhomdidthebattlebreakout?[br][originaltext]AKosovanmanwa
Whatisthetalkmainlyabout?[br][originaltext]Thereisanartexhibiti
Whatisthetalkmainlyabout?[br][originaltext]Thereisanartexhibiti
TechnoServeisanon-profitgroupthat[originaltext]Startingabusinessis
WhatdoesthemanworkonwithAnne?[br][originaltext]W:George,I’mwonderin
WhatdoesthemanworkonwithAnne?[br][originaltext]W:George,I’mwonderin
WhatdoesthemanworkonwithAnne?[br][originaltext]W:George,I’mwonderin
WhydidthewomangotoHongKong?[br][originaltext]M:Hi,Maggie!Haven’ts
WhydidthewomangotoHongKong?[originaltext]M:Hi,Maggie!Haven’tseenyo
WhichisNOTtrueoftheman?[br][originaltext]Man:Oh,hello,LeeDong.Come
随机试题
Whenweplaytenniswehaveto______.[br]Accordingtotheauthor,achild’sc
[originaltext]WhenmysonRyansawaT-shirtonsalefor5dollarsmarkedd
某个厂长想生产假冒伪劣产品,因为这样可能会赚很多钱,但是因为坑害消费者,一旦被查
均一性红细胞血尿与非均一性红细胞血尿的区别是:A.异形红细胞≥80% B.异形
1岁男孩,腹泻、呕吐4天,大便黄色水样,少量黏液,量多十余次/日,伴呕吐、发热、
中国共产党第一次专题研究依法治国问题的中央全会是()。A.十八届三中全会 B.
诊断肝细胞癌的特异性指标是( )。A.甲胎蛋白(AFP) B.碱性磷酸酶同工
妇女妊娠3个月内患哪种病最容易影响胚胎的正常发育A.风疹 B.丹痧 C.
患者女,7岁,因多数乳恒牙龋坏去口腔科就诊。医生治疗龋坏后建议使用氟水漱口防龋。
以下不属于工程勘察设计招标文件组成的是( )。A.招标公告(或投标邀请书)
最新回复
(
0
)