首页
登录
职称英语
Why did the sugar cane farmers bring cane toads to Australia? [br] [originaltex
Why did the sugar cane farmers bring cane toads to Australia? [br] [originaltex
游客
2023-11-12
50
管理
问题
Why did the sugar cane farmers bring cane toads to Australia? [br]
Perhaps the most unusual animal ever brought to Australia was the cane toad. It is a large and ugly species of toad and was imported to this country by sugar cane farmers in 1935 [18B] to get rid of the beetles which killed the sugar cane plants.
The cane beetle is the natural enemy of the sugar cane plant. It lives in the cane and drops its eggs onto the ground around the base of the cane. The eggs develop into worms and then the worms eat the roots of the cane, resulting in the death of the plant. In the mid 30s there was a serious outbreak of cane beetles and the farmers became desperate to get rid of the pest which was ruining their livelihood.
Meanwhile it was reported that a toad, native to Central America, had been taken to Hawaii, where cane is also grown, and introduced with apparent success. So the Australian farmers arranged to import one hundred toads from Hawaii. The toads were then released into the cane fields to kill cane beetles.
As predicted, the toads started to breed successfully and within a very short time their numbers had swollen. But there was one serious problem. It turned out that [20A] cane toads did not eat cane beetles. And the reason for this is that toads live on insects that are found on the ground and the cane beetle lives at the top of the cane plant well out of reach of the toads. In fact they never come into contact with each other.
选项
A、The cane toads did not eat the cane beetles.
B、The number of the cane toads had swollen.
C、There was another outbreak of the cane beetles.
D、The cane toads killed all the cane beetles.
答案
A
解析
短文结尾提到,澳大利亚看到夏威夷蔗农的成功样例后,决定引入蔗蟾,但是引入之后,问题也出来了,那就是蔗蟾(cane toads)并没有吃蔗虫(cane beetles),故答案为[A]。
转载请注明原文地址:http://tihaiku.com/zcyy/3179526.html
相关试题推荐
HowmuchwasimportincomeoftradeinMay?[br][originaltext]TheU.S.tr
HowmuchwasimportincomeoftradeinMay?[originaltext]TheU.S.tradega
Whendidtheblackminersriot?[br][originaltext]13,000blackminersrio
Priortotheformationofatornado,_________.[br][originaltext]Oneoft
Priortotheformationofatornado,_________.[br][originaltext]Oneoft
Whatmaybetherelationshipbetweenthetwopeople?[br][originaltext]F:Hi,
Whatmaybetherelationshipbetweenthetwopeople?[br][originaltext]F:Hi,
Therebellionhaslasted______.[br][originaltext]Theweek-oldMexicor
Whendidthetermlobbyistbecomepopular?[originaltext]Theartoflobbying
Undertheagreement,thenuclearwarheadswillbe[originaltext]Nationallaw
随机试题
[originaltext]M:Amy,whatwasyourfirstjob?W:Well,whenIgraduatedfromt
[originaltext]Theneedforbirthcontrolmethodshasdevelopedfairlyrecen
Iaskedsuccessfulpeoplewhatthesecretoftheirsuccesswas.I【B1】______
[originaltext]W:Whatareyoudoing?M:I’morderingsomefilingcabinetsouto
______(最令她伤心的不是工作多么累),butthatdespiteshehaddoneeverything,shewasnotack
A. B.1/n C. D.
下列有关控制测试程序的说法中,正确的是( )。 A.注册会计师应当将观察与
上腹部搏动可见于A.左心房肥大 B.左心室肥大 C.右心室肥大 D.右心房
物业服务企业与业主或物业使用人所订立的其他合同有()。A:供水供电有偿委托合同
我国人群HBSAg阳性率平均为10%,某地随机抽查100人,其中HBSAg阳性2
最新回复
(
0
)