F[x]中，与x+1相伴的是（）。
A、2x-1
B、2x+2
C、x-1
D、2x+1
参考答案：B
[听力原文] 两大洲维持较为开放的经济联系对双方怎么样？（）
A．愚蠢
B．有利
C．明智
D．领先
As per PMBOK, various executing processes fall into specific knowledge areas. "Develop project team" is a part of which of the following knowledge areas ？（）
A．Project management integration.
B．Project procurement management.
C．Project human resource management.
D．Project communications management.
