Tinymonitoringdeviceshavebecomeanincreasinglycommonwayforscientiststostudyelusiveanimalsthataredifficulttotrackonaday-to-daybasis．However，nowitseemsthatsmartsealshavecaughtontothetrickandareusingittot
<p>问题：Tinymonitoringdeviceshavebecomeanincreasinglycommonwayforscientiststostudyelusiveanimalsthataredifficulttotrackonaday-to-daybasis．However，nowitseemsthatsmartsealshavecaughtontothetrickandareusingittotheira<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">高鹏飞的回答：<div class="content-b">网友采纳 28．D词义指代题．根据第一段的Tinymonitoringdeviceshavebecomeanincreasinglycommonwayforscientiststostudyelusiveanimals可知，thetrick指代的是在海洋动物身上安置跟踪器一事．故选D． 29．C推理判断题．根据第三段的However，aftertheyhadbeeninthepoolafewtimes，theystartedlocatingthetaggedfishmuchfaster．以及第四段的Sureenough，thesealswereallattractedtotheonethatwassendingoutsignals．可推断，他们得出的结论是海豹确实可以通过跟踪这些跟踪器来捕获猎物．故选C． 30．B推理判断题．根据第五段的Sadly，predatorslikesharksthathavebeentaggedbyscientistsmaybenegativelyaffected，aspingstheyemitcouldwarntheirpreyoftheirpresence．可推断，这些研究人员似乎相信安装有这种跟踪器的鲨鱼不好捕食．故选B． 31．A．结构题．有全文可知，第一段讲述了科学家们发现灰海豹可以利用一些安装在鱼身上的跟踪器来捕获猎物．二三四段讲了实验过程，最后一段综述这一发现的影响，故选A．
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