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
To prevent a newly built dam on the Chiff River from blocking the route of fish migrating to breeding grounds upstream, the dam
To prevent a newly built dam on the Chiff River from blocking the route of fish migrating to breeding grounds upstream, the dam
admin
2019-11-17
83
问题
To prevent a newly built dam on the Chiff River from blocking the route of fish migrating to breeding grounds upstream, the dam includes a fish pass, a mechanism designed to allow fish through the dam. Before the construction of the dam and fish pass, several thousand fish a day swam upriver during spawning season. But in the first season after the project’s completion, only 300 per day made the journey. Clearly, the fish pass is defective.
Which of the following, if true, most seriously weakens the argument?
选项
A、Fish that have migrated to the upstream breeding grounds do not return down the Chiff River again.
B、On other rivers in the region, the construction of dams with fish passes has led to only small decreases in the number of fish migrating upstream.
C、The construction of the dam stirred up potentially toxic river sediments that were carried downstream.
D、Populations of migratory fish in the Chiff River have been declining slightly over the last 20 years.
E、During spawning season, the dam releases sufficient water for migratory fish below the dam to swim upstream.
答案
C
解析
Argument Evaluation
Situation A new dam includes a mechanism called a fish pass designed to allow fish to migrate upstream past the dam to their breeding grounds. The number of migrating fish fell from several thousand per day before the dam was built to three hundred per day in the first season after it was built, indicating—according to the argument—that the fish pass is defective.
Reasoning What evidence would suggest that the fish pass is not defective? The argument implicitly reasons that a defective fish pass would make it difficult for the fish to migrate, which would explain why the number of migrating fish fell when the dam was completed. Any evidence suggesting an alternative explanation for the reduced number of migrating fish, such as an environmental change that occurred when the dam was built, would cast doubt on the argument’s reasoning.
A A defective fish pass could prevent most of the fish from migrating upstream regardless of whether those that succeed ever return downstream.
B This would suggest that dams with properly functioning fish passes do not greatly reduce the number of migrating fish, so it would provide further evidence that the fish pass in this particular dam is defective.
C Correct. This suggests that the toxic sediments may have poisoned the fish and reduced their population. A smaller fish population could be sufficient to explain the reduced number offish migrating, which casts doubt on the argument’s assumption that the explanation for their declining numbers involves the fish pass.
D A slight and gradual ongoing decline in migratory fish populations would not explain an abrupt and extreme decline right after the dam was built.
E This supports the argument’s proposed explanation for the declining fish population by ruling out the alternative explanation that the dam does not release enough water for the fish to migrate.
The correct answer is C.
转载请注明原文地址:https://kaotiyun.com/show/IQkO777K
本试题收录于:
GMAT VERBAL题库GMAT分类
0
GMAT VERBAL
GMAT
相关试题推荐
Itwassuggestedthat_______bigeventliketheYearofRussiainChinashouldcertainlybenefit________relationshipbetweenth
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
Themostimportant________ofhisspeechwasthatweshouldallworkwhole-heartedlyforthepeople.
Duringthemiddleofthe19thcentury,【T1】Germany,alongwithotherEuropeannations,sufferedfromworkplacedeathsandaccide
Generallyspeaking,employersarelookingfortwothingsinjobapplicants:proofthatacandidatecanhandleaspecificjoband
【T1】Whiletherearealmostasmanydefinitionsofhistoryastherearehistorians,modernpracticemostcloselyconformstoone
Studiesofskilledlanguagelearnershaveidentifiedspecificlisteningstrategiesthatleadtosuperiorcomprehension
Duringhislife,J.S.BachwasnotaspopularasBeethovenandMozartduringtheirlifetimes.Hismusicwasconsideredhardto
Toimprovethe______isregardedasagoodmethodtoincreasethefarmer’sincomeinthesouthpartofthecountry.
随机试题
证明:对有向图的顶点适当地编号,可使其邻接矩阵为下三角形且主对角线为全0的充要条件是该图为无环图。
镜影细胞的特点包括
影响访谈调查质量及完成情况的一个主要因素是
男,52岁,劳累后突然出现胸痛,呈压榨性,较剧烈,伴大汗、面色苍白,休息后缓解,但反复发作。此时最有效的办法是
某县的甲公司未经漫画家乙许可,将其创作的一幅漫画作品作为新产品的商标使用,并于2003年3月3日被核准注册。乙认为其著作权受到侵害,与甲发生纠纷。乙应当采取下列哪种方式保护自己的合法权益?(2008年试卷三第22题)
开发区大气环境容量是指满足环境质量目标的前提下污染物的()。
合伙人应当按照合伙协议约定的(),履行出资义务。
金融租赁公司是以资金融通为目的,以租赁业务为载体的非银行金融机构。()
既可以用于证明应聘者在求职申请表中所提供信息的真实性,也可以说明其过去的经历,以及目前的现状,乃至未来发展的可能性的背景材料是()。
材料:刘老师讲到“白求恩不远万里来到中国”时,一个学生突然大声说:“那么远?怎么来?是坐飞机,还是坐轮船?”同学们都笑了起来。刘老师也笑了,想了想,向同学们提出了这样几个问题:白求恩来中国的方式可能有哪几种?“不远万里”又该怎样解释?这体现了白求
最新回复
(
0
)