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1.\u4f7f\u7528CDN
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2.\u8fc7\u6ee4\u6076\u610f\u6d41\u91cf
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3.\u914d\u7f6e\u9650\u5236
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4.\u4f7f\u7528CAPTCHA
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1.\u4e0e\u4f60\u7684\u6258\u7ba1\u670d\u52a1\u63d0\u4f9b\u5546\u8054\u7cfb
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2.\u6682\u65f6\u5173\u95ed\u7f51\u7ad9
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3.\u5907\u4efd\u548c\u66f4\u65b0
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