《孔雀东南飞》里，刘兰芝“十三能织素，十四学裁衣，十五弹箜篌，十六诵诗书”，请问，“箜篌”是什么乐器（）
参考答案：拨弦乐器
已知a与b互为相反数，且c与d互为倒数，那么代数式|a+b|+9cd的值为（ ）
A．0
B．9
C．1
D．无法确定
You are assigned as the project manager in the middle of the project．The project is within the baselines，but the customer is not happy with the performance of the project．What is the FIRST thing you should do ？（）
A．Discuss it with the project tea
B．Recalculate baseline
C．Renegotiate the contrac
D．Meet with the custome
