销售物流的环节包括（）
A.产品包装
B.产品储存
C.产品生产
D.装卸搬运
E.运输和配送
参考答案：A, B, D, E
血红蛋白的动力学氧结合曲线是（）
A.U型曲线
B.S型曲线
C.W型曲线
D.A型曲线
E.T型曲线
was to blame.
A．The parents as well as their child
B．Not the parents but their child
C．Neither the child nor his parents
D．Both the parents and their child
