引起食品腐败变质的环境因素主要包括______等。
A．温度
B．湿度
C．阳光
D．氧气
参考答案：A,B,C,D
Index funds are:（）
A. on average underpriced by 15%, but this underpricing varies over time, which supports the EMH.
B. on average overderpriced by 15%, but this overpricing varies over time, which supports the EMH.
C. security portfolios designed to duplicate the composition and therefore the performance of a selected market index series.
货物在发生异常后异常反馈的时间标准是多少？
