16．So you think you know your dog．But how well does your dog know you？She probably recognizes you when she sees you．But can a dog tell by simply looking at you whether you have a happy or an angry expression on your face？Researchers in Austria have taught pet dogs to know the difference．
Dogs are very mindful of sound．When dog owners shout or speak in a strong，unkind voice，dogs often act ashamed and quietly move away from the area．
Recently，researchers found that dogs can look at our faces，and tell the difference between a smile and a frown（皱眉）．The animals were able to recognize a look of praise from one of blame．
Researchers at the University of Veterinary Medicine，Vienna performed a series of experiments．They taught dogs to recognize facial expressions．They showed the dogs two pictures of either the upper or lower half of a person's face．On one picture，the person looked happy．The other appeared angry．
The dogs were then shown images of the eyes or mouths of people they had never seen before．They were also shown the left half of the faces used in training．
Corsin Muller led the study．"We were really speaking，do they realize that smiling eyes have the same meaning as a smiling mouth，or angry eyes have the same meaning as an angry mouth？And it turned out that they really did perform very well in these research experiments．"
Once the dogs learned to recognize which image was happy or angry，they could easily find the same expressions in pictures of any face．
Corsin Muller says future studies will try to show whether dogs can learn the meaning of facial expressions-for example，whether a frown shows that someone is angry．
In the experiments，researchers found the dogs were slower to link a reward，or prize，with recognition of the angry face．This suggested that dogs had an idea people with angry faces were best avoided．
29．What does the passage mainly tell us？D
A．How one can know his dog well．
B．How a dog can probably be well trained．
C．How a dog can tell one something．
D．whether dogs can recognize our facial expressions
30．Hearing its owner's strong，unkind voice，a dog is likely toC．
A．jump happily
B．act excitedly
C．escape quietly
D．shout loudly
31．A dog is able to recognize one'sD．
A．praise
B．blame
C．anger
D．all of the above
32．What can we learn from the passage？B
A．Dogs are as clever as human beings．
B．Dogs can understand man's feelings．
C．Dogs can be trained to do everything．
D．Dogs can learn to make any angry face．
分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了一位科学家通过实验证明了狗能识别人的情绪的问题．
解答 29．D．主旨大意题．阅读短文But can a dog tell by simply looking at you whether you have a happy or an angry expression on your face？Researchers in Austria have taught pet dogs to know the difference可知这篇短文主要讲述了一位科学家通过实验证明了狗能识别人的情绪的问题．故选D．
30．C．细节理解题．根据第二段When dog owners shout or speak in a strong，unkind voice，dogs often act ashamed and quietly move away from the area可知听到主人强烈而不友善的声音，狗很可能会悄悄离开；故选C．
31．D．细节理解题．根据最后一段In the experiments，researchers found the dogs were slower to link a reward，or prize，with recognition of the angry face可知狗能认出自己主人的表扬，责备，愤怒的表情；故选D．
32．B．推理判断题．根据最后一段In the experiments，researchers found the dogs were slower to link a reward，or prize，with recognition of the angry face可知狗能理解人的感情；故选B．
点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
