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下列（）属于引用数据类型。（先两项）
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Jacob hissummer holidaysspentontheBigIslandof Hawaiiwithitsbeautifullandscapeandtranquil asarareescapefromthemadnessof .(urban,lookbackon,atmosphere)
Learningintheinformation isreallyconvenientandefficient. Withyourcomputer the Internet,youcaneasilyobtainresourcesrelevanttoyourresearch.(era,electronic,hookupto)
Detectives,whobelievemorethanonepersonisbehindtheconstantattacksin,areusing computerto specificbehaviorandsituations.However,they arealsoawarethattheyshouldn'trelytoomuchon computerbecauseitmayattimes.(suburb, system,sophisticated, analyze,error)
(1)show that crime in (2) areas is now rising faster than in the cities. The (3) when the countryside (4) safety and security haslong gone. No longer is it safe anywhere to go out leaving the door (5). We all feel (6) and seek to strengthen the (7) we use to hold criminals at bay. These can range from old fashioned bolts and bars to the latest (8) devices.A moment's (9) , however, is enough to bring us face to face with the following puzzle: we may have locked the evils out, but in doing so we have locked ourselves in. This hardly seems a (10) way of life.
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