管理决策技巧
参考答案：就是领导者必须掌握的现代管理概念、意识和经营决策之道。
免疫学分析中，商品标准品为 （）
A.一级标准
B.二级标准
C.三级标准
D.四级标准
E.五级标准
Speaker A: Do you think you could keep the noise down a bitSpeaker B: ______
A．Yes, of course I could. I will turn it down a bit.
B．Oh, I beg your pardon. I think so.
C．Yes, sorry. Am I disturbing you
D．Sorry! Have I been keeping you awake
