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Intercept a section of network cable and burn it under the network cable with a lighter. If the outer skin of the network cable has flame resistance, the outer skin of the network cable will gradually melt and deform, but it will not burn, and generally there will be no black smoke. If the network cable is fake, or if the outer skin does not have flame resistance, the network cable will be lit in a short time when the lighter is used to burn, and black smoke will be generated and there will be a great taste. This kind of network cable obviously does not meet the safety standards.117. X.X.2Episode 7如果知道我秘密的唯一朋友转到我们班来?…1937年抗日战争爆发，继淞沪战争失利，南京吃紧。中华民族危急存亡之际，国民政府宣布迁都重庆，日军从 1938年2月18日至1944年12月19日，对重庆及周边地区实施无差别轰炸，长达六年零十个月。重庆市民面对日军残酷的狂轰滥炸，依然向死而生、乐观坚强，展现了重庆不死中国不亡的民族气节。为了保卫家 园，年轻的中国飞行员在美国飞行教官的帮助下与日本空军展开了一系列惨烈悲壮的空战。虽然飞行装备远远落后于日 军，但他们宁愿战死在天上，也不在地上苟活，与敌人在长空进行殊死搏斗......3. The reusability of the algorithm is poor. If another form is added to the program and this form also needs some similar validation, then we may need to copy the code again.她惊慌地叫起来，哪里有人应答。