Nancy doesn’t know ______ next week.

A．when the meeting started

B．when did the meeting start

C．when the meeting will start

D．when will the meeting start

施工成本控制工作的核心是( )，其主要目的在于找出产生偏差的原因，从而采取有针对性的措施。

A．分析
B．比较
C．预测
D．纠偏