According to the passage, which of the following is a characteristic that distinguishes electroreceptors from tactile receptors?

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问题 According to the passage, which of the following is a characteristic that distinguishes electroreceptors from tactile receptors?
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?

选项 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.

答案E

解析 The best answer is E. The last sentence in the passage implies that the researchers believed that the anteaters’ locating of their unseen prey was too prompt and too deliberate to be accidental. Choice A is incorrect: researchers were unable to confirm that the anteaters’ favorite prey, termites, emitted electrical signals, and the observation of anteaters locating ants’ nesting chambers “suggests” (lines 25), rather than proves conclusively, that anteaters use their electroreceptors to find prey. Choice B is incorrect because here is no indication in the passage that researchers believed that the anteaters’ behavior was atypical. Choice E is incorrect because, according to lines 24-27, the researchers believed that the anteaters “were using their electroreceptors to locate the nesting chambers”. Choice D is contradicted by the passage: in line 13, the anteater’s sensory system is described as “sophisticated”.
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