5 假定玉米市场的需求是缺乏弹性的,玉米的产量等于销售量且等于需求量,恶劣的气候条件使玉米产量下降20%,在这种情况下,( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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