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
A、Fish have difficulty absorbing oxygen in warmer seawater. B、The seawater temperature is increasing. C、Fish have trouble findin
A、Fish have difficulty absorbing oxygen in warmer seawater. B、The seawater temperature is increasing. C、Fish have trouble findin
admin
2013-04-15
35
问题
Recently completed research reveals warmer oceans caused by global warming is making it more difficult for fish to breathe and survive.
Biologists have known for years declining fish stocks arc connected to global warming, but a new study of eelpouts—big-headed fish that resemble eels—is the first to go deeper and see how warmer seas are connected to how fishes take in oxygen.
Scientists studied the relationship between sea temperature and eelpouts counts in the Southern North Sea, combining data from the field with lab investigations of eelpout physiology.
The researchers not only found the oxygen levels in the waters of the North and Baltic Seas have dropped because of increasing temperatures over the past 50 years--a factor that reduces fish population— they also discovered eelpouts need more oxygen in warmer waters, a second factor that is reducing their numbers.
A key factor in the diminishing size offish stock is increased difficulty in absorbing oxygen via respiration and blood circulation caused by the warming waters.
Animals tolerate a limited range of environmental conditions. Anything out of their tolerance can cause damage. Fish in the North Sea have evolved to tolerate a wider range of temperatures than fish elsewhere because of the large seasonal fluctuations there.
Worldwide, warming waters can be expected to strain species that require lots of oxygen, forcing them to either relocate to cooler waters or face extinction.
选项
A、Fish have difficulty absorbing oxygen in warmer seawater.
B、The seawater temperature is increasing.
C、Fish have trouble finding enough food in warmer seawater.
D、More fish have to find another location.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/6IB7777K
0
大学英语六级
相关试题推荐
ALookThatConveysaMessageTotouranassemblyplantinCanada,SergioMarchionne,thechiefexecutiveofChrysler,wore
Forthispart,youareallowed30minutestowriteashortessayentitledSocialNetworkSites.Youshouldwriteatleast150wo
A、There’samoralimperativetokeepourkidsinschool.B、There’sacorrelationbetweendropoutratesandcrime.C、Keepingkids
A、Silentreadinghadnotbeendiscovered.B、Fewpeoplecouldreadforthemselves.C、Peoplereliedonreadingforentertainment.
ComparingYourselftoOthers:It’sNotAllBad"Tocompareistodespair,"thesayinggoes,andI’vegenerallyfoundittob
A、HeadmiresJean’sstraightforwardness.B、HethinksDr.Browndeservesthepraise.C、HebelievesJeanwasrudetoDr.Brown.D、
Because______(好大学的文凭是好工作的敲门砖),educationisoneofthemostcompetitiveareasinJapaneselife.
RecentlytheGallupOrganizationreleaseditsfindingsaboutpublicopiniononglobalwarming.It’snotgoodnewsforactivists,
OntheCriteriatoJudgeOnesSuccess1.人们对成功有着不同的评判标准2.我认为成功与否最重要的标准是……3.我们大学生应该怎样做
随机试题
沃尔多的大部分著作都是在探索
便携式数据采集器与分析系统是一类带()的智能化仪器。
与类风湿因子特异性结合的是
新生儿颅内出血,首选的助诊方法是
关于部分性葡萄胎下列哪项是错误的( )
账务系统中,对结算方式进行设置的目的主要是()。
课程文件是根据课程设计的原理与方法而制定出的指导教学的各种规定。它的三三个层次中不包括()。
化学与日常生活密切相关,下列说法错误的是:
Youaregoingtostudyataforeignuniversity.Writealetterinquiringaboutthespecificinformationasregardsaccommodation
EffectiveNote-takingThedifficultyoftakingnotes:Note-takingrequiresahighlevelofabilityduetothe【T1】______ofspoke
最新回复
(
0
)