油井投产后,当地层压力低于饱和压力时,气油比就会很快()。
A、稳定
B、上升
C、下降
D、波动
参考答案:B
先用计算器计算下面各题的积,再直接填出横线上的数.
9×9=
99×99=
999×999=
9999×9999=
99999×99999=
______×______=______
______×______=______.
A project manager spent some days to create a multi-page document which he called project charter. The document should have been issued by the project sponsor. The sponsor found the document outsized and asked for a condensed document. Which of the following is not normally an element of the project charter ?()
A.The formal authorization to apply organizational resources to project activities
B.Detailed control account and work package descriptions
C.The business need that the project was undertaken to address
D.The product description or a reference to this document