配送加工主要由()组成。
A.分装
B.简单组装
C.再包装和贴标
D.外形的套裁
E.机械加工
参考答案:A, B, C, D
下列哪种因素不易使蛋白质变性()
A.加热震荡
B.有机溶剂
C.重金属盐
D.盐析
Many Americans do not understand why there is so much international criticism of the US policy on ________change.
A.atmosphere
B.sky
C.weather
D.climate