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视频安防监控系统：利用视频技术探测、监视设防区域并实时显示、记录现场图像的电子系统或网络。视频安防监控系统的组成：视频安防监控系统包括（）四部分。
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【简答题】Only when class began ____ that he had
left his book at home. A. will realize B. he did
realize C. did he realize D. should he realizeA. will realize B. he did realize C. did he reali...
【单选题】Which one below is not included in the “Word of the Year” list? _______
A.
“Vape” or “electronic cigarette”
B.
“Take a selfie”
C.
“ A cup of tea”
D.
“GIF” or Graphics Interchange Format
【简答题】最常用的透皮促进剂组合是
【简答题】Should ecigarettes (electronic cigarettes) be a new choice for the smokers trying to get rid of the habit? Reactions from Americans are mixed．More than half of the people questioned in a survey think...
【简答题】Should e-cigarettes (electronic cigarettes) be a new choice for the smokers trying to get rid of the habit? Reactions from Americans are mixed. More than half of the people questioned in a survey thin...
【简答题】Some places like restaurants, the work place, airplanes, buses and bars where you are prohibited from smoking allow you to smoke the electronic cigarette. With the exclusion of disgusting second hand ...
【简答题】E-cigarettes may be 'no better' than regular cigarettes The e-cigarette – the smoking alternative that has gone from nothing to a sprawling, unregulated multibillion dollar business in less than a dec...
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