党的十八大报告提出，要坚持以（）为中心的创作导向，提高文化产品质量，为人民提供更好更多精神食粮。
A.实践
B.人民
C.市场
参考答案：B
The scientist made several discoveries, __________.[ ]
A. which we think are important
B. which we think that is important
C. we think which are important
D. which we think is important
在项目实施阶段，工程管理的核心是( )。
A．成本控制B．合同管理C．进度控制D．质量控制
