我国现阶段的非公有制经济主要包括[ ]

 ①国有经济 ②个体经济 ③股份合作制经济 ④私营经济 ⑤外资经济

A．①②③

B．②③④

C．②④⑤

D．①②③④⑤

The earned value technique is a commonly used method of performance measurement. It integrates project scope, schedule, and cost measures to help the project management team assess project performance. If a project’s Cost Performance Index(CPI=EV/AC) value less than 1.0, it means that______.

A．the cost savings for work completed

B．the project is ahead of its planned schedule

C．the cost overrun for work completed

D．less work was completed than was planned