项目部总结：“双优化”效益由（）进行测算，主要与未优化前的成本进行对比来计算经济效益。

A、项目总工和商务经理

B、项目总工

C、商务经理

D、项目经理

If you can convince the interviewer of your special qualifications, your chance of being accepted will be greatly enhanced.

A．appreciated

B．encouraged

C．frustrated

D．increased