Large quantities of water, as well as some other timely help including a medical team ___ since the serious drought hit Yunnan Province. [ ]

A. has offered                          

B. had been offered  

C. have been offered                      

D. is offered  

详细可行性研究阶段的主要目标不包括( )。

A．提出项目建设方案

B．方案审核

C．效益分析和最终方案选择

D．确定项目投资的最终可行性和选择依据标准