The project, intended to ___ the economic development of the west of China, has brought in benefits to the local people.

A．reflect

B．promote

C．attract

D．construct

若某基准物质A的摩尔质量为100g/mol，用它标定0.1mol/L的溶液，假定反应为A+B=P，则每份基准物的称取量为：（）。

A.0.1～0.2g

B.0.2～0.4g

C.0.4～0.8g

D.1～2g