就是以一个企业的普查资料或某一地区的抽样调查资料为基础进行分析、判断,确定某一行业乃至整个市场的预测值 (分数:2 分)
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