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  3. Animals can perform many useful and entertaining jobs. People realize animals may not have the same intelligence as human beings

Animals can perform many useful and entertaining jobs. People realize animals may not have the same intelligence as human beings

admin2009-06-28  27
问题    Animals can perform many useful and entertaining jobs. People realize animals may not have the same intelligence as human beings. They are clever enough to learn many things.
   For example, dogs are particularly valuable in guiding the blind, protecting property, finding lost people, and hunting animals. It is not very difficult to learn some easy commands. Such as "sit, lie down, stay here, come here, bring clothes" and so on.
   Training a dog to be a watchdog often produces unexpected results. Some dogs quickly learn the difference between strangers and friends.  This is because their masters welcome friends and invite them into their houses. Sometimes dogs always attack the postman who comes to deliver letters. One explanation for this behavior is that the postman comes to the house often. He never enters the house. So the dog thinks the postman is not wanted.
   Horses are also able to learn many things. Horses that are used for guard or police duty must learn never to be frightened of noises, traffic and other disturbances. Racing horses are able to run much faster than other horses.
选项 A、is invited to enter the house
B、always carries large bags
C、speaks loudly
D、comes very often
答案A
解析 文章的第三段讲述了经过训练之后的狗对于主人的朋友和经常送邮件的邮递员持不同的态度。狗之所以怀疑邮递员是因为邮递员与主人的朋友有一个不同点就是邮递员从不进入主人房里。
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