移动平均法是对( )的一种改良
A.算术平均法
B.几何平均法
C.数学模型法
D.时距扩大法
正确答案是D
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The traditional method of food drying is to put it in places through which hot air is blown at temperature of about 110°C at entry to about 43°C at exit. This is the usual method for drying such things as vegetables, meat and