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The outer surface is plated with copper, and the raw material of the core wire is mainly aluminum. The outer surface is scraped and the aluminum core is silvery white. The quotation per unit of aluminum is about 1/4 of that of copper, and the same volume of aluminum is only 1/3 of that of copper, so the quotation per unit of copper clad aluminum is much cheaper than that of oxygen-free copper. Copper-clad aluminum has poor oxidation resistance, faster oxidation speed in humid environment, and poor tortuosity resistance of aluminum raw materials. It is not suitable for laying in the wall, and is only suitable for customers who do not have high demand for network stability or may temporarily establish a network.清末，河北香木镇，管家老陆的儿子陆书白出生在书香世家徐门。他天生聪慧无双，资质过人，到七岁时便能熟背诸子百家。见此情形，徐家老爷老翰林徐简博甚是欢喜，将他收为义子，带在身边精心培养。从此，书白便多了两位异姓兄弟──徐简博老爷子的一双亲生儿女与他同吃住、同读书、同玩耍。哥哥徐书成从小熟读三千故学，也是千里挑一的才俊。姐姐徐书容更是知性贤淑，是一个有着脱俗气质的东方女孩。三人在老翰林的爱护和监督下逐渐长大成人，每日里吟诗答对，琴棋书画，日子过得好不快活。 　　可惜好景不长，光绪三十一年，在中国历史上延续了1300年的科举制度被废止，为保科举，徐简博进京死谏，而历史的洪流已经无法阻挡，老翰林最终泣血紫禁城。徐门就此凋敝，书白、书成、书容这三个年轻人也在乱世书香中展开了各自跌宕起伏的人生。一对从海外流落大陆的间谍夫妻，中年危机的日子过得一地鸡毛。面前有国家安全局专案女组长带队紧密追查，背后有残忍的上线步步紧逼，这对在夹缝中挣扎抉择的迷途夫妻，究竟该何去何从？"It 's a flying bee, Wings are particularly numerous, He was covered in yellow and black, It is the way yellow and black are arranged in such a way. One by one is as big as a slap with an open hand. As soon as it flies, it is a large area. There is a poisonous needle behind the belly, It stings people, One can kill you, My comrades around me, Because there are no fewer than five sacrifices, I remember when the battle was coming to an end, I helped a comrade-in-arms who was stung to squeeze poison out, To squeeze, The wound, which was almost the size of a grain of rice, gushed out a pale yellow 'water', Sprayed directly on my neck, At that time, I felt that my neck was burning, then I felt pain first, then numbness. At the most numbness, my whole head lost consciousness. My neck drooped down and my comrades washed the spilled place several times with river water. It took me a long time to recover. I thought that it was the same when I sprayed it on my body. If I stung it directly into my body, I would basically not live. " Zhang Xiaobo pointed to his neck as he said.　　许多年过去，老一辈龙珠战士开始退居幕后，悟天、特兰克斯和比迪丽寻找散落各地的龙珠。三人路过一个山村，这里连年遭受天灾，村民认为惹恼了山中的恶魔，于是希望献上童女高高以平息恶魔的诅咒。悟天等人为救高高，答应帮村民除掉恶魔，却撞见了从沉睡中苏醒的布洛迪。一场大战在所难免……Since UDP is not a connection protocol, it has the advantages of low resource consumption and fast processing speed. Therefore, UDP is usually used more in audio, video and ordinary data transmission, because even if they occasionally lose one or two data packets, they will not have much impact on the reception results. For example, ICQ and QQ we use to chat are UDP protocols.　　日本版沿用了以地名作为剧名，六本木也是东京融合了很多外国文化的繁华地段之一。