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
2
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
ReadcarefullythefollowingexcerptandthenwriteyourresponseinNOLESS
[originaltext]W:Itoldyouthatyoushouldnotbelateforclass.M:Well,I’
ManyEuropeancountrieshavebeenmakingtheshifttoelectricvehiclesandG
我国法定的职业肿瘤是A.苯所致白血病 B.紫外线所致皮肤癌 C.镍和镍化合物
国务院测绘行政主管部门收到重要地理信息数据的公布公告后,应当在规定的时间内通知(
稻谷∶粮食∶种植A.钢笔∶文具∶绘画 B.水果∶西瓜∶切割 C.人才∶资源∶
应我国相关企业的申请,商务部对来自甲国的钢材进行了保障措施调查,根据我国法律的规
缓释片应检查的项目是A.释放度 B.崩解时限 C.发泡量 D.融变时限
A.HMGCoA合成酶 B.HMGCoA还原酶 C.琥珀酰CoA转硫酶 D
妊娠合并肝炎对胎儿的影响不正确的是A、胎儿窘迫 B、早产 C、死胎 D、流
最新回复
(
0
)