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问题 填空题

若角α与角β互补，且α-β=30°，则角α=______度．

答案

根据余角和补角的概念以及题意可知：

α+β=180°（1），

α-β=30°（2），

（1）+（2）得

α=105°．

故答案为105．

单项选择题

Management information systems form a bedrock ofIT use in the public sector. They are therefore found in all sections ofthe public sector and in all countries..Of course， different people use the term "management information system" differently: The term should therefore not form the basis for arguments about  （） an MIS is and is not. So long as one and those with whom one works understand and agree on a definition， that is good enough.Similarly， when dealing with written material， one needs to be able to（）and communicate， not get locked into doctrinal debate，

Many public service providers have developed management information systems to morutor and control the services that they provide. Both the US （） UK Social Security agencies have developed MIS to report on the welfare payments and services that they provide . The British public healthcare system has also been a major investor in MIS as it 1ries to control healthcare costs and simultaneously improve delivery standards .

Individual schools can also（）use ofMIS. Hobmoor Junior and Infant School， a public school in Birmingham， UK， introduced a computerised attendance system to produce MIS reports that monitor pupil attendance. This improved the Principal’s ability to understand and control absence patterns， resulting in a 2.5 per cent （） in attendance rates.

 

when dealing with written material， one needs to be able to（）and communicate， not get locked into doctrinal debate，Many public service providers have developed management information systems to morutor and control the services that they provide.

A．look

B．understand

C．get

D．familar
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单项选择题

设D是以(1，1)，(-1，1)和(-1，-1)为顶点的三角形区域，D1是D的第一象限部分，则

=______。

A．


B．


C．


D．
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