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
What does the speaker mainly discuss?
What does the speaker mainly discuss?
admin
2009-06-24
51
问题
What does the speaker mainly discuss?
I want to talk today about some studies. They seem to indicate that it is in a startling world-wide decline in the number of amphibians, such as fogs, toads and salamanders. There’s little doubt that one reason why the number of amphibians is declining is their habitats have been destroyed when the developers fill in ponds and marshes to build houses. Amphibians can’t just move somewhere. They need water to lay their eggs in. Another problem is the growing fish industry. Another range of popular and pool fish such as carp has been introduced to many lakes and ponds all over the world. Raising and selling these fish can be profitable, but the fish eat the eggs and offspring of amphibians that were already living in the lakes and ponds. Other factors that could be contributing to the decline include acid rain and the spread pesticide residues. Many pesticides that farmers added to their crops are eventually washed away by the rain and end up in ponds and other bodies of water where amphibians live. Amphibians are especially vulnerable to pesticides dissolved in the water because of their moist skins. Water can pass through amphibians allowing toxicants dissolved in the water to enter the amphibians body.
选项
A、By taking over ponds.
B、By constructing sewers.
C、By building dams on rivers.
D、By flooding marshes.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/vfTd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
ThefirstfourminutesWhendopeopledecidewhetherornottheywanttobecomefriends?Duringtheirfirstfourminutestog
StressLevelTiedtoEducationLevelPeoplewithlesseducationsufferfewerstressfuldays,accordingtoareportinthecu
SurveyFoundManyWomenMisinformedAboutCancerSixty-threepercentofAmericanwomenthinkthatifthere’snofamilyhist
Hewouldnotgiveupthoughherealizedthatpeoplewouldnotregardhimasalawfulking.
TheySayIreland’stheBestIrelandisthebestplaceintheworldtoliveinfor2005,accordingtoalifequalityranking
TheySayIreland’stheBestIrelandisthebestplaceintheworldtoliveinfor2005,accordingtoalifequalityranking
RisingTuitionintheUSEverySpring,USuniversityadministratorsgathertodiscussthenextacademicyear’sbudget.They
Whatisspecialaboutthetreasures?Whywerethetreasuresinspectedbyinternationalarchaeologistsin1993?
TheFatProblemthatMenFaceItisapleasuretoseemenofacertainageworryingabouttheirweight.Listeningtothemis
______hotweathermaycauseserioushealthproblemsassociatedwithairpollution?______humanactivitiescontributetoglobal
随机试题
A.耳前淋巴结B.颌下淋巴结C.颌上淋巴结D.颏下淋巴结E.耳后淋巴结前牙及口底炎症主要引流至
既可治血虚萎黄、心悸、失眠、月经不调,又可治肾阴不足,潮热、盗汗、遗精等的药物是
固体制剂在规定的介质中,以规定方法进行检查,崩解溶散并通过规定孔径的筛网所需时间的限度,一般称为
发生粉尘爆炸的首要条件是()。
土石坝工作面的划分,应尽可能()。
以下片段选自某课堂实录,请分析该教学片段并回答下列问题:(1)该片段体现了哪种语法教学方法?(2)常见的语法教学方法有哪些?(3)语法教学的课堂模式主要有哪些?教学中应该遵循哪些语法教学的原则?教学片段:老师:同学们上午好!今天我们来讲宾语补足语
围绕组织目标,制定实施方案,在政府管理运行中所处的阶段为()。
Youwillhearfiveshortpieces.Foreachpiecedecidehowmuchisthetotalamountthespeakeristalkingabout.Writeonelett
Whatwasthesituationoftheindependentfilmproducers?
WhenIwasatschool,my【B1】______wastobeapilotintheairforce.Butmyeyesightwasn’tgoodenough.SoIhadtogiveuptha
最新回复
(
0
)