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阅读青海省的图文资料，回答下列问题。(22分) 中国2010年上海世博会青海馆以“中华水塔·三江源”为主题，展现中华水塔的山水风情与三江源的生态意境，引导人们寻找中华民族母亲河的出生地，揭示三江源是生命之源、文明之源和城市之源。 (1) 青海馆外墙的色调由明快的绿、颜色构成，绿色代表着江河源头的生命气息和净土特色，白色象征着高耸的昆仑雪峰，“青海省地理简图”上甲、乙、丙三条山脉中表示“昆仑山脉”的是___；图中C是指三大江河中的___。（4分） (2) 分析青海省成为“中华水塔”的自然地理条件。(6分) (3) 面对我国城市发展中的水资源问题，青海省深感作为“中华水塔”所肩负的责任，确立了“环保立省”的发展之道。简述我国城市发展中面临的水资源方面的问题及其产生的原因，并提出青海省作为“中华水塔”应该采取的有效措施。（12分）
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