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标题: 请教 大全-c-12 [打印本页]

作者: dux509    时间: 2004-11-26 11:07
标题: 请教 大全-c-12

Which of the following best completes the passage below?


Monarch butterflies, whose average life span is nine months, migrate from the midwestern United States to selected forests outside Mexico City. It takes at least three generations of monarchs to make the journey, so the great-great-grandchildren who finally arrive in the Mexican forests have never been there before. Yet they return to the same trees their forebears left. Scientists theorize that monarchs, like homing pigeons, map their routes according to the earth’s electromagnetic fields. As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of “butterfly trees” in the Mexican forests. If the butterflies are either especially attracted to the grove with the transmitter or especially repelled by it, lepidopterists will have evidence that______


(A) monarch butterflies have brains, however minuscule


(B) monarch butterflies are sensitive to electricity


(C) low-voltage electricity can affect butterflies, whether positively or adversely


(D) monarchs map their routes according to the earth’s electromagnetic fields


(E) monarchs communicate in intergenerationally via electromagnetic fields


答案b,而从题目给出的目的用该是为了验证electromagnetic fields,而不是electricity,我觉得应该是d比较好,我看讨论有些人倾向于c,我觉得c一个是因为缺少monarch的限定,最主要的还是因为electricity而不是electronmagnetic fields。所以我认为d较好。思维有问题吗?难道这二者是一样的?胡涂了,请指出我的毛病所在。谢谢


作者: 花椰菜    时间: 2004-11-26 16:16
我觉得是B对。题中意思是说the first step to test this theory,而且low-voltage transmitter意思是低压发射装置的意思,仅仅靠这个玩意还不足以证明D和E的内容,差的远了。
作者: 音乐咖啡猫    时间: 2004-11-28 16:26

dux509,我开始也是犯这样的错误,可是后来想想,D是错的。

原文只是提到M Butterflies,象PIGEON一样,按照the earth’s electromagnetic fields来指引route,可是文章并没有说pigeon和M butterflies一样,对于这个装置有一样的反应,因此不可以类比,无法推出。另外,文章还说道这个test是first step,可能后面还有其它test,来证明完全和pigeon一样,D把由局部推整体了,我想这也是不对的另外一个原因。

如果其它NN有不同意见,请指正。


作者: dux509    时间: 2004-12-1 00:12

谢谢 花椰菜,音乐咖啡猫。

其中竟然还有两个细节,多谢点拨。


作者: lingling2005    时间: 2005-2-17 02:31
What is "low-voltage transmitter "? How could we know that "low-voltage transmitter " is affect electricity, not electromagnetic fields?
作者: tuzq    时间: 2005-2-19 00:26

是呀,而且难道就凭first step就能说明试验结果不能证明全部吗?这个也太牵强了。


作者: Chamao    时间: 2005-4-27 11:28
我想,first step,是一个暗示的名词吧?在大全里头,发现每次自己错都是因为这些小细节漏掉的关系。
作者: nevia    时间: 2005-6-26 14:46

D的错误主要是由局部推整体。即使low-voltage transmitter 可以产生电流,同时还有电磁场,那这个实验也只能说明这种蝴蝶受到low-voltage transmitter 产生的电流或者电磁场的影响,远不是地球产生的电磁场。


再加一个,就是题目里first step的暗示了。这个词说明这一步的实验离最终的结论还差几步,所以这一步得出的肯定不是最初要论证的结论。


[此贴子已经被作者于2005-6-26 14:46:29编辑过]

作者: 丑得老婆哭    时间: 2005-9-14 17:09
我对B唯一的疑问就是electricity.题中并没说过这个啊。电流和电磁场还是有区别吧?!
作者: 无尾小恶魔    时间: 2005-10-30 12:29

同意9楼的说法,好像没什么仪器能够“感觉”到电流的吧,应该是电流产生的磁场才能被感应


当然,D也不对,但是好歹和文章还有点关系


作者: steveyangxt    时间: 2005-12-22 16:57

As a first step in testing this theory, lepidopterists plan to install a low-voltage transmitter inside one grove of “butterfly trees” in the Mexican forests. If the butterflies are either especially attracted to the grove with the transmitter or especially repelled by it, lepidopterists will have evidence


我觉得上面的前提是低压电流传感器, 所以结论出现电流使相关的。 毕竟是试验的初级阶段嘛,以后怎么搞我们不知道, 也管不着。


作者: judiwind2006    时间: 2006-8-3 11:38
up
作者: fengyun1    时间: 2006-8-22 12:54

我也错在D。关于D,我有不同的看法。原文的结论就是D,Scientists theorize that monarchs, like homing pigeons, map their routes according to the earth’s electromagnetic fields. 后来他是要作一个实验来说明他有evidence ,所以肯定答案不会是D,否则conclusion=evidence。


作者: luckyouyang    时间: 2006-12-17 21:27

C选项太黑了,其它选项都是monarch butterflies ,C选项变成了:low-voltage electricity can affect butterflies, whether positively or adversely


作者: Xunan    时间: 2008-8-18 20:13
我选的B`




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