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
2024-09-23
27
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:https://www.tihaiku.com/zcyy/3771404.html
相关试题推荐
NajibullahZaziwasarrestedbecause[br][originaltext][28D]AnAfghanim
NajibullahZaziwasarrestedbecause[originaltext][28D]AnAfghanimmigran
Thecarisexpectedtotravelataspeedof______perhour.[br][originaltext]
Thecarisexpectedtotravelataspeedof______perhour.[originaltext]AB
TheUnitedStateshasdecidedto[br][originaltext][25C]TheUnitedStates
Whydopeopleleavehometotravelaccordingtothepassage?[br][originaltext
Thespeakerwantsustoknowthatachild[br][originaltext][18B]Playis
Thespeakerwantsustoknowthatachild[br][originaltext][18B]Playis
Thespeakerwantsustoknowthatachild[originaltext][18B]Playisthepr
Whatdoplantsdowhentheyarethirsty?[br][originaltext]Weallscreamf
随机试题
Atthislastpresidentialinaugurationofthe20thcentury,letusliftour
[originaltext]W:Whydoyoulooksoworried?M:I’llhaveajobinterviewthis
TopicGotoWorkorBecomeAPostgraduate?Forthispart,youareallowed
[originaltext](32)ItisnoteasytobecomeadoctorintheUnitedStates.
采用地震波法进行超前地质预报,关于探测资料的相关解释,正确的包括()。A:反射
在精密附着体的制作过程中,附着体的放置遵守的原则是A.保留牙体组织的原则 B.
甲与乙为夫妻,甲因有婚外情,欲毒死乙,便从村小卖部买来两包老鼠药投入乙的饭碗中,
5、 【文件五】 类别:电子邮件 来件人:张家来某超市门店经理 收件人:
蛛网膜下腔阻滞的注药速度一般为 A.每分钟1mlB.每分钟5mlC.每5秒
由于基期选择的不同,发展速度分为()。A.定基发展速度 B.报告期发展速
最新回复
(
0
)