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
26
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://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
Thefridgeisconsideredanecessity.Ithasbeensosincethe1960swhenpa
下列哪种荧光灯灯具效率为最低?()A.开敞式灯具 B.带透明保护罩灯具
患者体内有睾丸和卵巢两种性腺同时存在时,称为A.女性假两性畸形 B.男性假两性
男性,69岁,因刺激性咳嗽、痰中带血2周就诊。体检无阳性体征。痰检找到鳞癌细胞,
()为了应对未来一定期限内资产的非预期损失而应该持有或需要的资本金.A.账
关于牛皮癣,错误的描述是A.好发于老年人 B.好发于颈项部位 C.可用消风散
既能用于小便不利、水肿,又能用于脾虚证的药物是A.泽泻 B.猪苓 C.车前子
特高压交直流工程一般需要开展专项沿线污秽调查以确定外绝缘配置。海拔高度超过800
男,34岁。牙外伤后3个月,要求固定义齿修复。检查缺失,残根稳固,行根管治疗
某工程网络计划中,工作M的自由时差为2天,总时差为5天。进度检查时发现该工作的持
最新回复
(
0
)