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
Two decades after the Emerald River Dam was built, none of the eight fish species native to the Emerald River was still reproduc
Two decades after the Emerald River Dam was built, none of the eight fish species native to the Emerald River was still reproduc
admin
2014-10-21
29
问题
Two decades after the Emerald River Dam was built, none of the eight fish species native to the Emerald River was still reproducing adequately in the river below the dam. Since the dam reduced the annual range of water temperature in the river below the dam from 50 degrees to 6 degrees, scientists have hypothesized that sharply rising water temperatures must be involved in signaling the native species to begin the reproductive cycle. Which of the following statements, if true, would most strengthen the scientists’ hypothesis?
选项
A、The native fish species were still able to reproduce only in side streams of the river below the dam where the annual temperature range remains approximately 50 degrees.
B、Before the dam was built, the Emerald River annually overflowed its banks, creating backwaters that were critical breeding areas for the native species of fish.
C、The lowest recorded temperature of the Emerald River before the dam was built was 34 degrees, whereas the lowest recorded temperature of the river after the dam was built has been 43 degrees.
D、Nonnative species of fish, introduced into the Emerald River after the dam was built, have begun competing with the declining native fish species for food and space.
E、Five of the fish species native to the Emerald River are not native to any other river in North America.
答案
A
解析
要说明该假说是可靠的,证明Emerald河流域中温度差别较大的河水中生长的鱼没有失去它们的繁殖能力就很重要,选项(A)说明这些鱼仍能繁殖,因此是正确答案;选项(B)通过提出一个完全不。司的假说削弱了该假说;选项(C)试图支持温度变化减小了的说法,但没有证明这是正确的解释;由于(D)谈到土产鱼类开始减少后的一种发展,同关心这种减少的最初原因的该假说无关;选项(E)强调了该问题的严重性,但没有说明是什么原因造成的。
转载请注明原文地址:https://kaotiyun.com/show/ZZtO777K
本试题收录于:
GMAT VERBAL题库GMAT分类
0
GMAT VERBAL
GMAT
相关试题推荐
Packagingisaveryimportantformofadvertising.Apackagecansometimesmotivatepeopletobuyproducts.Forexample,alittl
Personswhoareoverweightshouldwatchtheirdietcarefullyinordertolosepounds.Thebestwaytodothisistostartaweig
Onespringafternoonfiveyearsago,JimmywascryinginthehallofTaipei’sSherwoodHotel.Lifeseemedunfair.Thepeoplewho
Theautomobilehasmanyadvantages.Aboveall,itofferspeoplefreedomtogowhereverandwhenevertheywanttogo.However,to
In1984,PresidentRonaldReaganproposedthattheUnitedStates______alaunchlaboratoryforaneweraofspaceexploration.
IntheUnitedStates,30percentoftheadultpopulationhasa"weightproblem".Tomanypeople,thecauseisobvious:theyeat
I’dratherhavearoomofmyown,howeversmallitis,than________aroomwithsomeoneelse.
Manyillegalorganizationstrytocheatpeopleformoney______thebank.
Hehasbeencalledthe"missinglink."Half-man,half-beast.Heissupposedtoliveinthehighestmountainintheworld-
AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair
随机试题
国际私法
下列对上腭生理功能的描述,哪个是错的
依照《医疗事故处理条例》规定,医疗机构未制定有关防范和处理医疗事故的,应由卫生行政部门予以()
乙某于1999年3月因聚众斗殴罪被判刑3年,刑满释放后,经常夜间携带三棱刮刀到处游荡。2002年9月上旬,乙嫌这把三棱刮刀不锋利,又购买一把三棱刮刀带在身上,9月16日晚9时许,乙在当地一小卖部门前闲逛,遇见相识的周某、吴某、王某等人。周、吴等先后来向乙要
我国金融机构体系由构成。()
调节纳税人税收负担的纵向公平问题,税率形式多为( )。
房地产开发企业为建造自用办公楼取得土地使用权而支付的土地出让金不计入在建工程成本,应确认为存货。()
湖南省人口最多的少数民族是()。
回答问题1至问题3。
在C++语言中,数据封装要解决的问题是
最新回复
(
0
)