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"作为一名CSI，我们总在人们最低谷的时候与他们相会。‘节哀顺变’，这句我们被要求对他们所说的套话，其实并没能带去多少安慰。”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.For a course, check the evaluation, especially pay attention to negative evaluation, what are the deficiencies, and are these deficiencies reasonable? What progress has TA students made and whether they have overcome obstacles in their studies.攻守互换，夺命书生开始不断紧逼，唐伯虎的状况似乎不妙起来。　　失业又失恋的陈美陷入困境，正在这时，她中学时代好友、时尚杂志总经理秘书罗美玲仗义地挺身而出，不但建议陈美住她那里，更带来一个消息，与她所在的“SHOW”时尚杂志社正在招聘编辑。