谈判准备阶段的最后一项工作是（ ）
A．拟订谈判方案
B．模拟谈判
C．组成谈判班子
D．准备谈判资料
参考答案：B
--- We want to sit at the table near the window.
--- I am sorry, but it _______ already.
A．took
B．takes
C．has been taken
D．is taking
集成运放电路由输入级、中间级、输出级三部分组成。
