某零售商从很多批发商处进货,再按照消费者的需求、以及所在区域的消费特征配置产品,便于消费购买。该零售商承担的功能是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧