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
There have long been dead zones–water too low in oxygen to sustain most forms of life—in the Gulf of Mexico, which receives the
There have long been dead zones–water too low in oxygen to sustain most forms of life—in the Gulf of Mexico, which receives the
admin
2018-07-04
78
问题
There have long been dead zones–water too low in oxygen to sustain most forms of life—in the Gulf of Mexico, which receives the waters of the Mississippi River. Scientists studied sediment cores from areas where the gulf’s most recent dead zone occurred. The scientists dated the sediment and counted species of foraminifera (marine protozoans) in the sediment; these species thrive in low-oxygen waters. As far back as 1823, the foraminifera thrived especially during Mississippi River flood years (during which nutrients levels increase), suggesting that nutrients in floodwaters can trigger low-oxygen water. The foraminifera in the core samples were most abundant after 1950, when farmers began using some fertilizer, which is rich in nutrients. Researchers believe that increased use of fertilizer leads to more-extreme dead zones.
Which of the following best describes the function of the highlighted sentence in the context of the passage as a whole?
选项
A、It reconciles two opposing theories that were discussed earlier in the passage.
B、It suggests what the initial impetus was for the studies mentioned earlier in the passage.
C、It undermines a hypothesis that was presented in the preceding sentence.
D、It describes a problem with the methodology of the studies discussed in the passage.
E、It provides evidence supporting the belief mentioned in the final sentence of the passage.
答案
E
解析
高亮句子表明foraminifera的数量增加是与使用肥料同步的,而科学家们又知道营养物可以促进低氧水的产生进而促进foraminifera的生长,因此高亮句就是一个证据,最终引出了最后一句,肥料会促进死亡区域的产生这一结论。
转载请注明原文地址:https://kaotiyun.com/show/OKjO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Thefollowingdatasufficiencyproblemsconsistofaquestionandtwostatements,labeled(1)and(2),inwhichcertaindataare
TheauthormentionseachofthefollowingasacauseofexcessinventoryEXCEPT______Thepassageprovidesinformationthatsup
MilankovitchproposedintheearlytwentiethcenturythattheiceageswerecausedbyvariationsintheEarth’sorbitaroundthe
Itcanbearguedthatmuchconsumerdissatisfactionwithmarketingstrategiesarisesfromaninabilitytoaimadvertisingatonl
BetweentheeighthandeleventhcenturiesA.D.,theByzantineEmpirestagedanalmostunparalleledeconomicandculturalreviv
JosephGlatthaar’sForgedinBattleisnotthefirstexcellentstudyofBlacksoldiersandtheirWhiteofficersintheCivilWar
Regionalandlocaltelephonecompaniesaroundthenationarebeginningtooffercustomersanelectronicoperatorsystemthatall
Thecommissionacknowledgedthatnoamountofmoneyorstaffmemberscanensurethesafetyofpeoplewholiveinthevicinityof
Asaresultofmedicaladvances,manypeoplethatmightatonetimehavediedaschildrenofsuchinfectionsasdiphtheria,pneu
随机试题
右上肢烧伤后,创面有大水疱,剧痛,其深度为()。
按照建设工程设计合同示范文本规定,设计人按合同规定时限交付设计资料及文件后,如果在1年内项目未开始施工,则设计人( )。
在工程施工中由于()原因导致工期延误,承包方应该承担违约责任。
根据《税收征收管理法》的规定,纳税人逃避、拒绝、阻挠税务机关检查时,税务机关有权采取的措施是()。
A注册会计师负责审计甲公司2011年度财务报表。在识别、评估和应对由于舞弊导致的重大错报风险时,A注册会计师遇到下列事项,请代为做出正确的专业判断。在财务报表审计过程中不属于注册会计师需要考虑的编制虚假财务报告的舞弊行为是()。
现阶段我国教育目的的重点是()。
为什么要提初等教育?正是多亏了这些学校,美国的早期技工才普遍能读会写,并精通算术,掌握一定的几何和三角知识,这种情况在新英格兰和大西洋中部各州尤为常见。目光敏锐的外国观察家认为美国人的适应能力和创造能力得益于这种教育。正如1853年访美的一个英国访问团成员
结合材料回答问题:材料11944年正值李自成领导的农民起义军进入北京推翻明王朝300周年,郭沫若毅然放下正在进行的先秦思想史研究,撰写《甲申三百年祭》。在这篇文章中,郭沫若深刻总结了李自成农民起义成功建立起大顺朝但旋即失败的历史教训。从3月19日起
某条上海到乌鲁木齐的线缆长为4120km,传输带宽峰值为155Mb/s,信号在导体中的传输速度为光速的2/3,那么平均约有(5)字节正在光缆中通行(光速为300000km/s)。
为考生文件夹下的LI\ZUG文件夹建立名为KZUG的快捷方式,并存放在考生文件夹下。
最新回复
(
0
)