7．For those who study the development of intelligence（智力）in the animal world，self-awareness is an important measurement．An animal that is aware（意识）of itself has a high level of intelligence．
Awareness can be tested by studying whether the animal recognizes itself in the mirror，that is，its own reflected image（反射出的影像）．Many animals fail this exercise bitterly，paying evry little attention to the reflected image．Only humans，and some intelligent animals like apes and dolphins，have shown to recognize that the image in the mirror is of themselves．
Now another animal has joined the club．In the Proceedings of the National Academy of Sciences，researchers report that an Asian elephant has passed the mirror self-reflection test．
"We thought that elephants were the next important animal，"said Dinana Reiss of the Wildlife Conservation Society，an author of the study with Joshua M．Plotnik and Fans B．M．de Waal of Emory University．With their large brains，Reiss said，elephants"seemed like cousins to apes and dolphins．"
The researchers tested Happy，Maxine and Patty，three elephants at the Bronx Zoo．They put an 8-foot-square mirror on a wall of the animals'play area （out of the sight of zoo visitors） and recorded what happened with cameras，including one built in the mirror．
The elephants used their long noses to find what was behind it，and to examine parts of their bodies．
Of the three，Happy then passed the test，in which a clear mark was painted on one side of her face．She could tell the mark was there by looking in the mirror，and she used the mirror to touch the mark with her long nose．
Diana Reiss said，"We knew elephants were intelligent，but now we can talk about their intelligence in a better way．"
45．What can mirror tests tell us about animals？B
A．Whether they have large brains．
B．Whether they have self-awareness．
C．Whether they enjoy outdoor exercises．
D．Whether they enjoy playing with mirrors．
46．Why does the author mention apes and dolphins in the text？D
A．They are most familiar to readers．
B．They are big favorites with zoo visitors．
C．They are included in the study by Reiss．
D．They are already known to be intelligent．
47．What made Happy different from Maxine and Patty？B
A．She used her nose to search behind the mirror．
B．She recognized her own image in the mirror．
C．She painted a mark on her own face．
D．She found the hidden camera．
分析 本文主要讲述了人类通过研究动物是否能够认出镜中的自己，即自己反射出的影像来测试意识．许多动物在这项测试中惨败，它们几乎没注意过那反射出的影像．事实显示，只有人类和一些高智商的动物，如猿和海豚，能够辨认出镜中的影像就是自己．
解答 45：B细节题．由第二段第一句"Awareness can be tested by studying whether the animal recognizes itself in the mirror"可以通过研究动物是否能够认出镜中的自己，既是自己反射出的影像来测试意识． 可知正确答案为B．
46：D推断题．由第一段第一句"For those who study the development of intelligence in the animal world，self-awareness is an important measurement．"可知，自我意识是衡量智力的一个重要标准．而第二段"Only humans and some intelligent animals like apes and dolphins，have been shown to recognize that the image in the mirror is of themselves．"告诉我们只有大猩猩和海豚能像人类一样通过镜像测试，所以他们是有较高智力的，故正确答案为D．
47：B细节题．由第七段第一句"Of the three，Happy then passed the test，in which a clear mark was painted on one side of her face．She could tell the mark was there by looking in the mirror，and she used the mirror to touch the mark with her long nose．"可知 Happy 通过镜子看到自己脸上的图画，而 Maxine 和 Patty 没有，故正确答案为B．
点评 本文是一个科技类阅读理解，题目涉及多道细节理解题，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
