文章作者 100test 发表时间 2009:04:30 08:04:53
来源 100Test.Com百考试题网
Having discovered the electroreceptors, researchers are now investigating how本段小主题:如何利用 anteaters utilize such a sophisticated sensory system. In one behavioral experiment*4, 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*4C researchers’ hypothesis that anteaters use electroreceptors to detect electrical signals given off by prey. however(转折), researchers as yet have been unable to detect electrical signals emanating from termite mounds, where the favorite food of anteaters live. Still(转折,以最后一重转折为准), researchers have observed anteaters breaking into a nest of ants*5 at an oblique angle (oblique angle: 斜角(包括锐角和钝角)) and quickly locating nesting chambers. This ability quickly*5E to locate unseen prey suggests*5A, according to the researchers, that the anteaters were using their electroreceptors to locate the nesting chambers.
1. According to the passage, which of the following is a characteristic that distinguishes*1 electroreceptors from tactile receptors?