建设工程项目管理的运行机制由施工成本核算制与( )共同构成。
A．项目质量责任制
B．安全生产责任制
C．项目经理责任制
D．成本目标责任制
参考答案：C
When I got to the cinema, the film _____ for five minutes.[ ]
A: had started
B: had been on
C: has been on
D: has started
毒物是如何在体内贮存的？
