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
2014-01-27
48
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、Pesticides can cause an amphibian’s skin to dry out.
B、Pesticides kill the insects that amphibians depend on for food.
C、Dissolved pesticides can easily enter amphibian’s bodies.
D、Amphibians may eat plants that have been treated with pesticides.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/lRXd777K
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
Sheisanartistwhoseworkwillundoubtedlywithstandthetestoftime.
Tostartanewbusiness,youshouldfirst______.
______hasadriverseatthatcanbeadjustedtofitmostpeople?______hasitshandbookcriticised?
Fromthepassagewelearnthatmandiesinseadisastersmainlybecause______Wecaninferfromthepassagethat______
TherecentsocialandeconomicchangesintheU.S.havegreatimpactonalltheAmericanhousingsystem.
TherecentsocialandeconomicchangesintheU.S.havegreatimpactonalltheAmericanhousingsystem.
Thepassageismainlyconcernedwith______.Farmersshouldnotbeblamedfortherisebecause______.
theclimateaffectsthefuturesustainableagriculturaldevelopment?pollutioncanbecontrolledbyincreasingtheproductionc
theclimateaffectsthefuturesustainableagriculturaldevelopment?theenvironmentalproblemsarenotcausedovernight?
随机试题
德意志在普法战争和第一次世界大战中一胜一败,这一胜一败对德国历史的发展产生了什么影响?试结合史实和有关国际背景扼要说明之。
在PC机中,显示卡与主板之间使用接口可以是_______。
再造散的组成药物中含有
A.亲和力及内在活性都强B.与亲和力和内在活性无关C.具有一定亲和力但内在活性弱D.有亲和力、无内在活性,与受体不可逆性结合E.有亲和力、无内在活性,与激动药竞争相同受体效价高、效能强的激动药()。
对红外线辐射,应重点防护的人体部位是()
贵金属贡齐()
2003年5月北京某出口加工区某进出口企业从日本进口一批电子产品。货物于2003年5月8日从长崎启运,5月15日货物抵达天津港,次日通过铁路运抵北京。该货物进行正常的报关、纳税、放行手续。2004年1月海关稽查该企业单证时,发现该企业在进口这批货物时故意瞒
以下饭店前厅部的对客服务流程中,正确的有()。
自2008年美国次贷危机后,我国通过与很多贸易伙伴国家签订了双边货币互换协议,于是人民币通过跨境贸易结算开始了其国际化的进程,然而人民币始终未能在资本和金融账户下实现自由兑换。2015年中国启动成立亚投行,但在2015年前几个月,我国出口不景气,外汇储备减
Accordingtothewriter,themotorvehicleaccidenthappensessentiallybecauseof______.Thispassageismainlyabout______.
最新回复
(
0
)