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
2019-10-21
27
问题
What does the speaker mainly discuss?
I want to talk today about some studies. They seem to indicate that there is a startling world-wide decline in the number of amphibians, such as frogs, 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 pool fish such as carp have 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 could be contributing to the decline include acid rain and the spread of 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 toxins dissolved in the water to enter the amphibians’ body.
选项
A、The distribution of different species of amphibians.
B、Possible reasons for reduction in the number of amphibians.
C、The effects of environmental change on the fish industry.
D、Guidelines for the responsible use of pesticides.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/heWd777K
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
Americanscientistsinvarietyofdisciplinescontinuetostruggletostart______.
Americanscientistsinvarietyofdisciplinescontinuetostruggletostart______.
Oneofthemostimportantsocialdevelopments(31)helpedtomakepossibleashiftinthinkingabouttheroleofpubliceducatio
Whatisthespeakermainlydiscussing?
Whichofthefollowingcanproducethestrongestshock?Whichofthefollowingstatementsisnottrue?
WhatkindofoverviewdoesthebookintendtogiveaboutAmericansociety?
Howcanyouinterpretthesentence,middle-classwomenarebecomingincreasingly"polarised"(Para.3)?Thefollowingstatement
AndrenaGravidaisthenameofawildbeedecliningintheUnitedKingdomandtheNetherlands.A(31)ofmonthsagotherecentd
AnotherearlyNativeAmericantribein(31)isnowthesouthwesternpartoftheUnitedStateswastheAnasazi.ByA.D.800theA
A=HallucinogensB=CocaineC=AlcoholWhichdrug...mayslowdownbodyfunction?71.______canleadtothe
随机试题
A.GAPB.GLPC.GCPD.GMPE.GSP药品生产企业必须执行
聚丙烯酸的结构式为:它属于()。①无机物;②有机物;③高分子化合物;④离子化合物;⑤共价化合物
工程开工前,合同双方应做好有关准备工作,就工程师而言,特别要做好( )。
水泥复试内容有()。
指数可分析经济发展变化由各种因素的影响方向和程度。()
基金市场营销的特征不包括( )。
“借款人已资不抵债”属于()。
小李为某企业员工,已经在该企业工作八年,那么按照国家规定,他可以享受()天年假。
通常计算机的存储器是一个由Cache、主存和辅存构成的3级存储系统。辅助存储器一般可由磁盘、磁带和光盘等存储设备组成。Cache和主存一般是一种(11)存储器。在各种辅存中,除了(12)外,大多是便于脱卸和携带的。Cache存储器一般采用(13)半导体芯片
A、Notatall.B、Nottoobad.C、Icandoitwell.D、Givemeahand,please.B本题询问对问候语的回答。题目的意思是“好久没见到你了,你好吗?”Howareyoudoing相当于
最新回复
(
0
)