问题描述：
关于demand和supply的问题
explain the following statement:"Due to the continuing political uncretainty in the middle East and Iraq the price of petrol rises,and the price of used luxury cars in the 写论文写到这迷惑了～分析不清楚这个过程～没分了～
explain the following statement:"Due to the continuing political uncretainty in the middle East and Iraq the price of petrol rises,and the price of used luxury cars in the 写论文写到这迷惑了～分析不清楚这个过程～没分了～
问题解答：
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