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问题 单项选择题

为了提高能源的利用效率，降低成本，分布式发电往往采用冷、热、电联供或热电联产的方式，其运行时以热定电，综合热效率可达（）以上。

A.60%

B.70%

C.80%

D.90%

答案

参考答案：B

选择题

2013年国庆长假期间，景区拥堵，游客滞留、交通不畅较往年有过之而无不及，黄金周变成了“黄金粥”。假如你是一名人大代表，对此，你可以

①督促政府加强景区的经营和管理   ②向关部门提出合理化建议   

③监督《旅游法》的贯彻实施情况   ④向有关部门反映游客的意见

A．①③

B．①④

C．②③

D．②④
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单项选择题

Across a wide variety of fields, data are being collected and accumulated at a dramatic pace. There is an urgent need for a new generation of computational theories and tools to assist humans in (96) useful information (knowledge) from the rapidly growing (97) of digital data. These theories and tools are the subject of the emerging field of knowledge discovery in database (KDD). At an abstract level, the KDD field is concerned with the development of methods and techniques for making (98) of data. The basic problem addressed by the KDD process is one of mapping low-level data(which are typically too voluminous to understand and digest easily) into other forms that might be more (99) (for example, a short report), more (100) (for example, a descriptive approximation or model of the process that generated the data), or more useful (for example, a predictive model for estimating the value of future cases). At the core of the process is the application of specific data-mining methods for pattern discovery and extraction.

A．expiring

B．examining

C．extracting

D．extricating
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