采用ACD保存液全血及红细胞悬液保存期为：（）
A.7天；
B.14天；
C.21天；
D.28天
参考答案：C
---________________________?
----I’d like to buy some sausages.
A．Can you help me?
B．What can I do for you?
C．What are these?
D．What are you doing now?
物流可以比喻为是在供应链竞技场中的比赛。
