请教pippi，og 17?

Venus

3和5？
3.用排除法a 对，但我觉得应该是response to "weak " electrical stimuli, 因为tactile can also respond to electrical stimuli?

5.我读不出文章有speed 得比较？？

谢谢

Attached the article:
Australian researchers have discovered electroreceptors
(sensory organs designed to respond to electrical fields)
clustered at the tip of the spiny anteater’s snout. The
researchers made this discovery by exposing small areas of
(5) the snout to extremely weak electrical fields and recording
the transmission of resulting nervous activity to the brain.
While it is true that tactile receptors, another kind of
sensory organ on the anteater’s snout, can also respond to
electrical stimuli, such receptors do so only in response to
( 10) electrical field strengths about 1,000 times greater than
those known to excite electroreceptors.
Having discovered the electroreceptors, researchers are
now investigating how anteaters utilize such a sophisticated
sensory system. In one behavioral experiment, researchers
(15) successfully trained an anteater to distinguish between
two troughs of water, one with a weak electrical field
and the other with none. Such evidence is consistent with
researchers’ hypothesis that anteaters use electroreceptors
to detect electrical signals given off by prey; however,
( 20) researchers as yet have been unable to detect electrical
signals emanating from termite mounds, where the favorite
food of anteaters live. Still, researchers have observed
anteaters breaking into a nest of ants at an oblique angle
and quickly locating nesting chambers. This ability quickly
(25)to locate unseen prey suggests, according to the researchers, that the anteaters were using their electroreceptors
to locate the nesting chambers.
103. The author of the passage most probably discusses the
function of tactile receptors (lines 7-11) in order to
(A) eliminate and alternative explanation of anteaters’
response to electrical stimuli
(B) highlight a type of sensory organ that has a function
identical to that of electroreceptors
(C) point out a serious complication in the research on
electroreceptors in anteaters.
(D) suggest that tactile receptors assist electroreceptors
in the detection of electrical signals.
(E) introduce a factor that was not addressed in the
research on electroreceptors in anteaters.

105. The passage suggests that the researchers mentioned in
the second paragraph who observed anteaters break into
a nest of ants would most likely agree with which of the
following statements?
(A) The event they observed provides conclusive
evidence that anteaters use their electroreceptors to
locate unseen prey.
(B) The event they observed was atypical and may not
reflect the usual hunting practices of anteaters.
(C) It is likely that the anteaters located the ants’ nesting
chambers without the assistance of electroreceptors.
(D) Anteaters possess a very simple sensory system for
use in locating prey.
(E) The speed with which the anteaters located their
prey is greater than what might be expected on the
basis of chance alone.

pippi

文章最后 ：This ability quickly to locate unseen prey suggests, according to the researchers, that the anteaters were using their electroreceptors to locate the nesting chambers.

说明anteaters 能那么快的locate their prey 以至于the researchers认为这决不是偶然，（而是using their electroreceptors ）所以可以SUGGEST THAT：The speed with which the anteaters located their prey is greater ……

so E should be ok

Venus

5 解释得很有道理，谢谢！
3踢呢？你怎么考虑？

jerry1121

我觉得3应该是

http://forum.chasedream.com/dispbbs.asp?boardid=25&id=72845&star=1#1120501

不知道对不对

gigiga0118

102. Which of the following can be inferred about the

experiment described in the first paragraph?

(A) Researchers had difficulty verifying the existence of

electroreceptors in the anteater because

electroreceptors respond to such a narrow range of

electrical field strengths.

(B) Researchers found that the level of nervous activity

in the anteater’s brain increased dramatically as the

strength of the electrical stimulus was increased.

(C) Researchers found that some areas of the anteater’s

snout were not sensitive to a weak electrical

stimulus.

(D) Researchers found that the anteater’s tactile

receptors were more easily excited by a strong

electrical stimulus than were the electro receptors..

(E) Researchers tested small areas of the anteater’s snout

in order to ensure that only electroreceptors were

responding to the stimulus.

我的問題是102

我不知道B跟D要如何排除??

og對B/D的解釋都是文中沒有提到

我覺得有阿

B:

The

researchers made this discovery by exposing small areas of

(5) the snout to extremely weak electrical fields and recording

the transmission of resulting nervous activity to the brain.      

D:

While it is true that tactile receptors, another kind of

sensory organ on the anteater’s snout, can also respond to

electrical stimuli, such receptors do so only in response to

( 10) electrical field strengths about 1,000 times greater than

those known to excite electroreceptors.

這種infer題型

我覺得好像資訊都有沾到邊....

排除不了阿

jerry1121

While it is true that tactile receptors, another kind of

sensory organ on the anteater’s snout, can also respond to

electrical stimuli, such receptors do so only in response to

( 10) electrical field strengths about 1,000 times greater than

those known to excite electroreceptors.

我觉得这里是说tactile receptors只有在electrical field strengths 1,000 times greater those known to excite electroreceptors时才反应.这里没有比较tactile receptors和electroreceptors在strong electrical stimulus时,谁更容易. 而且我作为外行来看tactile receptors比electroreceptors更难反应.

不知道这样理解对不对

wangyu73cn

这里没有比较tactile receptors和electroreceptors在strong electrical stimulus时,谁更容易. 而且我作为外行来看tactile receptors比electroreceptors更难反应.

文中确实没有比较tactile receptors和electroreceptors在strong electrical stimulus时,谁更容易。我们不能推测出D选项。

B的内容在文中也没有。 Researchers found that the level of nervous activity in the anteater’s brain increased dramatically as the strength of the electrical stimulus was increased.

swlfx

强烈赞同牛牛。

思谦

请问nn们，像做102这种题目如何在文中快速定位呀？

思谦

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