未知题型
判定下列IP地址中哪些是无效的。 131.255.255.18 127.21.19.109 220.103.256.56 240.9.12.12 192.5.91.255 129.9.255.254 10.255.255.254
【参考答案】
["有效","无效","无效","无效","无效","有效","有效"]
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