某公司预测销售人员每月能够卖出1000件产品,而实际上他们只卖出了700件。这属于()造成的预测逆差。
A、销售效率
B、业务级别的改变
C、计划外支出
D、价格差别
参考答案:A
The mother asked her son________.
A.what did he do the day before
B.where did he find his lost wallet
C.what time he got up that morning
D.that if he had finished his homework
怎样才能测出准确的油气后效情况?