首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Why did the sugar cane farmers bring cane toads to Australia?
Why did the sugar cane farmers bring cane toads to Australia?
admin
2013-09-28
16
问题
Why did the sugar cane farmers bring cane toads to Australia?
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://kaotiyun.com/show/l3LK777K
0
专业英语四级
相关试题推荐
whyistheweightlossplancalledtheScarsdalediet?
Weshouldmakementalpreparationforfailure,becausethereisonlya(n)______numberofpossibilitiesofsuccess.
Theearthquakeof26thDecember2004resultedinoneoftheworstnaturaldisastersinlivingmemory.Itwasa【C1】______underwa
HealthMinisterNicolaRoxon’slatestproposalthatpatientsbeallocatedtodoctorsonalistbasisisstraightoutoftheplay
Themillionsofcalculationsinvolved,hadtheybeendonebyhand,______allpracticalvaluebythetimetheywerefinished.
In1967,inresponsetowidespreadpublicconcernarousedbymedicalreportsofasbestosrelateddeaths,theNationalMedicalRe
Beforethe1500’s,thewesternplainsofNorthAmericaweredominatedbyfarmers.Onegroup,theMandans,【C1】______intheupper
Beforethe1500’s,thewesternplainsofNorthAmericaweredominatedbyfarmers.Onegroup,theMandans,【C1】______intheupper
Statusesaremarveloushumaninventionsthatenableustogetalongwithoneanotherandtodeterminewherewe"fit"insociety.
Pardonme,butSarahmightnotturn______againuntil,say,tonight.
随机试题
设
在Excel2010中,要编辑某单元格中的一部分内容,说法错误的是()
下列关于采样的叙述,错误的是
《突发公共卫牛事件应急条例》规定,医疗卫生机构应当对传染病做到
A.水肿、血尿、高血压B.血尿、贫血、肾功能衰竭C.发作性肉眼血尿,无水肿与高血压D.水肿、蛋白尿、高血脂、低蛋白血症E.水肿、血尿、蛋白尿、高血压
加气混凝土条板用于卫生间墙体时,墙体防水层的高度应:[2018—067]
下列关于地籍控制的说法错误的是()。
属于单用户多任务的操作系统是()。
严慈相济体现的德育原则是()。
甲、乙两人去商店买水笔和笔记本,水笔的单价为16元,笔记本的单价为17元,若两人购买水笔和笔记本一共花费了268元,问他们一共买了多少水笔?
最新回复
(
0
)