寿命期不等的互斥方案比选可用最小公倍数法，该方法的特点为( )。A．用NAV指标，

已知集合A={1，2，3，4}，集合B={1，3，5，7，}，则A∩B=______，A∪B=______．

根据《联合国国际货物销售合同公约》的规定，一项有效的接受必须是完全同意发盘所提出的所有交易条件

（）是南平建设生态文明的重要抓手，是加快经济发展方式转变、实现可持续发展的重要基础。

A.生态市建设

B.保护环境

C.保护资源

Microsoft's COM is a software（1）that allows applications to be built from binary software components. COM is the underlying architecture that forms the foundation for higher-level software services, like those provided by OLE. COM defines a binary standard for function calling between components,a way for components to dynarmically discover the interfaces implemented by other components, and amechanism to identify components and their interfaces uniquely. OLE is a compound（2）standard developed by Microsoft. OLE makes it possible to create（3）with one application and link or embed them in a second application.Embedded objects retain their original format and（4）to the application that created them. Support for OLE is builtinto the Windows and MacOS Operating Systems.A（5）compound document standard developed mainly by Apple and IBM is called OpenDoc.

空白（3）处应选择（）

A.table

B.eventc

C.objects

D.function

黑苔干燥甚或枯痿与黑苔滑润所主病机有何不同？