小安81里的一篇OG阅读，求解

liuduyounie

小安81里面的文章，看标题写的是OG-17但是在OG12和OG13里面都找不到，这两道题怎么看都觉得答案不对啊，难道是我红色部分理解的不对么？（我的理解是：tactile receptors也可以回应电流的刺激，这种接收器只有在强于之前刺激electroreceptor1000倍的电流下才有反应 ）

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 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 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 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, 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 to locate unseen prey suggests, according to the researchers, that the anteaters were using their electroreceptors to locate the nesting chambers.

2.        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 electroreceptors.

(E) Researchers tested small areas of the anteater’s snout in order to ensure that only electroreceptors were responding to the stimulus.

3.        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

liuduyounie

为什么我的问题都木有人回答呢。。。

liuduyounie

自己顶。。。。。

liuduyounie

自己顶。。。。。。

典座

啊啊啊啊啊，我也错这两道题，求解答