经济活动中各产业之间的技术经济联系被称为产业关联，关联性强的

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经济活动中各产业之间的技术经济联系被称为产业关联，关联性强的产业发展有利于带动相关产业的协同发展。如房地产业的发展向上可带动建筑业，向下可带动家电业，形成建筑业—房地产业—家电产业协同发展。下列选项中构成产业链上下游协同发展关系的是
①钢铁产业 ②信息产业 ③保险业 ④汽车产业

A．①-②-③

B．①-④-③

C．②-③-④

D．④-③-①

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