Q31:
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.
Which of the following, if true, most strengthens the argument?
A. Ant flies do not attack black ants other than Loma ants.
答案A, 我选E, 排除它因加强, A无关, 没有涉及would benefit public health
请NNs指正
upup
觉得你的思路有点不太对。
E项“harmful effects on the environment”未涉及需要证明的结论“benefit public health”。跑到环境上了,有点远吧。而且题目中的条件都用不上了。
A项很清楚,L蚁死,一般B蚁无影响,仍然可控制有害rodents,对人类有益。
这也是题排除他因的典型题
ant flies 如果会吃其他的ant 那就有助于rodents的成长 对public health 就有危害
A排除了这个可能 进而strengthens the argument
E和原文的论点没有多大关联 我觉得E才是无关
第二遍看觉得还是A。
L蚁对人有害,消灭就是beneficial。普通B蚁也对人有益。明显是加强。
E只说杀虫剂可能对环境有害,但没有说其对ant flies计划的作用,不知道其对L蚁和B蚁分别的作用。
答岸是A,E讲的是对环境有利,离题了。
除Lema以外的black ants 对人类有益
Lema对人类不利,
antflies只吃lema,消除了不利因数,又没有削减有利因素,所以对人类有益。
我对这句不理解black ants help control rodent populations that pose a public health risk
看你们的意思是rodent对公众有害对吧?可是你看看that修饰的是谁啊。rodent不是中心词,如果要that指代也是指代population,逻辑不通了。
我是以为that指代black ants这样就是黑蚂蚁给公众健康带来危险吧?所以A也有点问题啊:它不杀对公众有害的黑蚂蚁成削弱了吧???
请教
Q31:
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.
Which of the following, if true, most strengthens the argument?
A. Ant flies do not attack black ants other than Loma ants.
答案A, 我选E, 排除它因加强, A无关, 没有涉及would benefit public health
请NNs指正
你是不是看错了,E 中是:have harmful effects on the environment., 怎么能加强?
我对这句不理解black ants help control rodent populations that pose a public health risk
看你们的意思是rodent对公众有害对吧?可是你看看that修饰的是谁啊。rodent不是中心词,如果要that指代也是指代population,逻辑不通了。
我是以为that指代black ants这样就是黑蚂蚁给公众健康带来危险吧?所以A也有点问题啊:它不杀对公众有害的黑蚂蚁成削弱了吧???
请教
Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.
文中的结论不是已经说了ant flies会prey on Loma ants了吗?为什么在A选项中还要重复再说一次呢?
个人觉得是E,The use of pesticides to control Loma ants could have harmful effects on the environment
harmful effects on the environment和benefit public health是有联系的,前者发生,后者有可能发生啊。
我觉得E排除了他因,就是使用杀虫剂可能对人类产生的不利后果。
不妨这样想一下E:如不用杀虫剂就不会对人类产生的不利后果,但一定是ANT FLIES会被用于对付L 么? 这里还存有其它的可能,--鸟,猫-花猫警长,等. 可能都要比ANT FLIES要厉害, 所以不能加强原文.
文中一段清楚表明, BLACK ANT 有利于控制鼠,是好东东.但L--BLACK ANT 的一个分支,却是个坏东东. 消灭L,保存其它的BLACK ANT==正是A所说的,加强原文.
不知表达的是否明白,讨论中.
C为什么不对呢
A是不是有些重复题意阿,并没有说ANT FLIES对人类没毒阿,而且他把loma 都吃了不吃black ant,那blackant岂不要继续祸害庄稼
A和E的抉择中
Rodent: Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors adapted for gnawing or nibbling.
也不一定就是只老鼠啊,还有松树之类的啊
C为什么不对呢
A是不是有些重复题意阿,并没有说ANT FLIES对人类没毒阿,而且他把loma 都吃了不吃black ant,那blackant岂不要继续祸害庄稼
C is not correct b/c those other ants are not introduced ^^
A) 不吃black ant - will help to control rodent populations -- public health
我的理解:
A. Ant flies do not attack black ants other than Loma ants.black ants吃rodents,现在存在black ants的天敌Loma ant,这个L对人类有害,所以现在引进ant lies吃Loma ants有利于公共健康。那么加强就是 ant flies只吃Loma ants不吃black ants,就保护了black ants在吃rodents的同时不被Loma ants吃掉,所以保护环境,要是ant flies也吃black ants那还搞屁啊?简化逻辑关系就是black ants吃rodents,Loma ants吃black ants,ant flies只吃Loma ants,但不吃black ants,一环套一环。
想明白了,做错了
原因是错误理解文中一句话:By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. 以为引入黑蚂蚁是为了经济原因(for seeds),没有看见红字。其实引入黑蚂蚁就是为了健康原因
所以a加强,e如果改成The use of pesticides to control Loma ants could have harmful effects on human health.也是可以有加强作用的
唉,笨笨!
发现steve GG 总是总结性发言,呵呵。我也总结一下吧。
我尝试总结下,这类题目的正解。
正确选项是那些,说明引如新方法或者措施后,排除掉新方法或措施可能带来的新问题或者负面影响的选项。保证了措施或方法只能达到原文目的,不能有其他目的的选项。
希望大家指证。
读懂文章很重要, 我也是理解错了这句话..
By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk
A
是not加weaken的用法
把not捂住,则变成ant files 通吃,其他black ants将不能吃rodents,从而削弱
16楼讲的很明白,赞一个!
题目说,那个ant有好的地方:控制啮齿动物数量,从而对public health 有好处,但也有坏的地方:毒刺。文章的结论是,引入它的天敌可以对public health有好处。
B说那个ant不如其他鸟控制啮齿有用,就是说它的好处不大,那么消灭它减少的坏处多,从而对public health有好处。
我认为题目是个权衡问题,请教nn阿,我的思路哪里不对啊
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