托福考試真題閱讀及答案解析托福真題及答案解析匯總(編輯修改稿)
2025-08-08 02:32 本頁面
【文章內(nèi)容簡介】 cs, cloth and posite materials. on paper it is often carried out as a largescale industrial process and is an essential part of publishing and transaction printing.原文回顧：這篇閱讀重復(fù)了2016年7月9日的一篇文章，而且在2015年9月5日也相同出現(xiàn)過。該魚發(fā)出的電信號(hào)實(shí)用性強(qiáng)。它可以幫助魚類定位找到準(zhǔn)確的出口，可以幫助魚類內(nèi)部相互交流和互動(dòng)。比如魚類之間的交配行為，雌魚和雄魚能夠根據(jù)對(duì)方發(fā)出的`信號(hào)確認(rèn)是否合適。它也是魚類進(jìn)攻和示弱的表現(xiàn)。這個(gè)電信號(hào)可以有多種方式來體現(xiàn)。比如加強(qiáng)，停頓，減弱。魚類為了信號(hào)不互相干擾，會(huì)停掉自己的信號(hào)去檢測其他魚的信號(hào)，但是這一個(gè)過程持續(xù)時(shí)間比較短。這種魚屬于交流時(shí)間迅速的一類。但也不是所有魚為了識(shí)別其他魚而停止釋放自己的信號(hào)。還有另一種魚可以同時(shí)注意自己和身邊的魚的輕快。1. some blind elephantnose fish produce weak electric signals that are used for detecting objects in their surroundingsa phenomenon called active electrolocation. these fish have specialized electric organs that discharge either in pulses or in a wavelike fashion, depending on the species. although discharges follow one another almost continuously throughout the life of the fish, their power level is much too low to be detected by human handlers but potent enough to create a stable electric field around the body of the fish. when an object enters into this electric field, it causes distortions in the current that are detected by electroreceptor organs distributed over the fish39。s skin.2. a weak electric system may have several uses, including the exploration of novel environments. for example, blind elephantnose fish can easily find the only opening that allows them to cross through a newly installed partition within their aquarium, even though they cannot see it with their eyes. their electric sense must be implicated because when these inspaniduals bee electrically silent (unable to use their electric system through denervation of their electric organs), they can no longer find the opening.3. during the 1970s, biologists became interested in the role of the weak electric system not only as a means of elect
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