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
32
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
Thehunter-gatherertribesthattodaylivelikeourprehistorichuman【M1】__
[originaltext]W:Hi,Chad.Whatareyoureading?M:Oh,(23)theannualairtra
红包,又叫“压岁钱”,是用红色信封或纸包着钱的红纸包儿。红包,通常是用于中国农历新年或喜庆时馈赠的礼金。派“红包”,是中国人过年的一种重要习俗。中国人喜
右归丸除温补肾阳处,还具有的功用是A.填精益髓 B.补益脾胃 C.理气健脾
商业银行实施有条件授信时应遵循()的原则。A.先授信,后用信 B.先用信,后
泽泻的药理作用有A.免疫调节、抗肝硬化 B.抗肿瘤、保肝 C.利尿、解热、镇
2012年,某啤酒公司因产品标识问题受到当地质量技术监督局的处罚,公司领导认识到
小张与某企业签订劳动合同。该企业为完成订单,违章指挥、强令小张冒险作业, 危及
《劳动争议调解仲裁法》第50条明确规定,当事人对仲裁裁决不服的,应当自收到仲裁裁
材料设备采购从合同性质上可以分为( )。A.买卖合同 B.租赁合同 C.劳
最新回复
(
0
)