被列入世界环保史册的珠江三角洲的基塘生产，出现了一些新的现象：20世纪90年代以来，桑基、蔗基鱼塘面积大量减小，果基鱼塘基本稳定，而花基鱼塘面积明显增加，并且随着盆花的大量外销，花基鱼塘已需要向其他鱼塘取泥。据此回答1~2题。

1、导致该地农业生产变化的主要原因是[ ]

A、当地水热条件的变化

B、技术水平提高

C、当地进行农业结构调整

D、交通条件改善

2、基塘农业在发展过程中应注意避免的问题是[ ]

A、鱼塘内的塘泥逐年减少

B、当地工业企业对鱼塘的污染

C、劳动力投入的减少

D、布局向粤西地区的转移

Microsoft’s COM is a software (71) 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 dynamically discover the interfaces implemented by other components, and a mechanism to identify components and their interfaces uniquely.
OLE is a compound (72) standard developed by Microsoft. OLE makes it possible to create (73) with one application and link or embed them in a second application. Embedded objects retain their original format and (74) to the application that created them. Support for OLE is built into the Windows and MacOS Operating Systems. A (75) compound document standard developed mainly by Apple and IBM is called OpenDoc.

A．contained

B．competing

C．connecting

D．completing