通过( )可有效提高费用、资源和时间估算准确性和各项工程过程的控制精度。

A．项目综合计划的制定

B．项目范围定义

C．项目综合计划的实施控制

D．项目范围确认

E．项目任务分解

The conference aims to develop business and let people think about _____ they can have a positive influence on the planet．

A．why

B．that

C．what

D．how