分析 研究人员发现,灰海豹可以利用一些安装在鱼身上的跟踪器来捕获猎物.
解答 28.D 词义指代题.根据第一段的Tiny monitoring devices have become an increasingly common way for scientists to study elusive animals可知,the trick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,after they had been in the pool a few times,they started locating the tagged fish much faster.以及第四段的Sure enough,the seals were all attracted to the one that was sending out signals.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,predators like sharks that have been tagged by scientists may be negatively affected,as pings they emit could warn their prey of their presence.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.
点评 科教类阅读难度比一般阅读较大,它存在的生词比较多,因此考生应当综合略读、跳读和查读,猜词等阅读技巧来做题,平时也应加强练习.
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