˵:
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ɫ,Ҫװ 
صַ
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ʹ˵:
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ϵͳɨCHKļָԭļ͵Ĺ.
ļ,֧.mp3,.jpg,.bmp,.avi,.mpg,.doc,.gif.
ҲҪļ:
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֧ļ͵ķ:
:file.typeļ(ļ),¸ʽҪ,Ӽ.
ʽ˵:FFD8FF jpg
   ļͷǰ6ֽ+ո+ļͺ׺
ļͷжϷ
16ı༭WinhexҪ֪ļ͵ļȡǰ6ֽڣʮƣ.jpgļǰ6ֽΪFFDBFF(ʮ)
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