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3.Police dogs are given special training to help the police with their work.Many different types of dogs can be trained to do this work,but the best known ones are German Shepherds and Bloodhounds.In Britain,police dogs have a 13-week training course and many dogs fail.Not all dogs make good police dogs.They must be completely reliable and obedient.
Dogs are not only used to chase and catch criminals,but also used for following suspects or finding missing persons.This is because some dogs,such as Bloodhounds,have a very good sense of smell and can be trained to recognize certain types of smells.Some dogs are used to find survivors after earthquakes or explosions and some are specially trained to find dead bodies.
In many countries,dogs are used in airports to check luggage for drugs and bombs.Labradors,Spaniels and Beagles are used for this because they are friendly dogs and people are not afraid of them.

76.Why are police dogs given special training?To help the police with their work.
77.How long does the training course for police dogs last in Britain?13 weeks.
78.What must good police dogs be like?They must be completely reliable and obedient
79.Can dogs be used for finding missing persons?Yes,they can.
80.Where are dogs used to check luggage for drugs and bombs in many countries?In airports.

分析 对警犬专门的训练是为了帮助警察工作,许多不同类型的狗可以被训练来做这个工作,在英国,警犬培训课程是13周.不是所有的狗都必须做出好的警犬,警犬必须可靠和听话.警犬必不仅是用来追逐和抓住罪犯,也用于寻找失踪的人,在机场还可以用于检查行李是否有毒品和炸弹.

解答 76.To help the police with their work细节理解题.根据Police dogs are given special training to help the police with their work可知对警犬专门的训练是为了帮助警察工作,故答案为:To help the police with their work.
77.13 weeks细节理解题.根据In Britain,police dogs have a 13-week training course and many dogs fail可知在英国,警犬培训课程是13周,故答案为:13 weeks.
78.They must be completely reliable and obedient细节理解题.根据They must be completely reliable and obedient可知警犬必须可靠和听话,故答案为:They must be completely reliable and obedient.
79.Yes,they can.细节理解题.根据but also used for following suspects or finding missing persons.可知警犬用于跟踪嫌疑人或寻找失踪人员,故答案为:Yes,they can.
80.In airports 细节理解题.根据In many countries,dogs are used in airports to check luggage for drugs and bombs可知在机场还可以用于检查行李是否有毒品和炸弹.故答案为:In airports.

点评 做题的时候要看清要求,要在理解好文意的基础上,与题目有机的结合,从文章中找到相关细节性的句子从而得出符合文章内容的正确答案.

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