4　 Once the dogs learned to recognize which image was happy or angry,they could easily identify the same expressions in pictures of any face.Future studies will try to show whether dogs can learn the meaning of facial expressions.　5　 The researchers’ findings were published in the journal Current Biology.They provide the first solid evidence that humans are not the only species that can read the body language of another species. 

　　(2015·山东济南一模)

　　A.Dogs are very aware of sound.

　　B.Dogs have feelings just as you do.

　　C.But how well does your dog know you?

　　D.They were also shown the left half of the faces used in training.

　　E.Some dogs are very unhappy when they are left alone for a long time.

　　F.They taught dogs to recognize facial expressions.

　　G.For example,whether a frown shows that someone is angry.

　　【文章大意】本文为说明文,文章通过实验表明狗能够辨别出人类的面部表情。

　　1.C　由后句“She probably recognizes you when she sees you.”可知,前句应是“小狗是如何辨认出你的”,故选C项。

　　2.A　第二段提到,当听到主人大声尖叫或呵斥的声音时,狗会表现得内疚或安静离开,因此该段主要讲述狗对主人声音的反应。故选A项。

　　3.F　前文提到了兽医大学的研究者针对狗辨别人类表情所做的实验,因此该句应是指他们教狗如何辨别人类的面部表情。F项顺承文意。

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