搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1/A2型题

某工人50岁，双下肢发紧、无力3个月，继而行走困难，双手持物力弱，查体：肌张力增高，肌力弱，有不规则感觉减弱区，Hoffmann征（+），可能是（）。

A.神经根型颈椎病

B.原发性神经炎

C.脊髓型颈椎病

D.椎动脉型颈椎病

E.脊髓空洞症

答案

参考答案：C

解析：脊髓型颈椎病的临床表现为：临床表现为早期双侧或单侧下肢麻木、疼痛、僵硬发抖、无力、颤抖，行走困难，继而双侧上肢发麻，握力减弱，容易失落物品。

单项选择题

Data mining is an (66) research field in database and artificial intelligence. In this paper, the data mining techniques are introduced broadly including its producing background, its application and its classification. The principal techniques used in the data mining are surveyed also, which include rule induction, decision (67) , artificial (68) network, genetic algorithm, fuzzy technique, rough set and visualization technique. Association rule mining, classification rule mining, outlier mining and clustering method are discussed in detail. The research achievements in association rule, the shortcomings of association rule measure standards and its (69) , the evaluation methods of classification rules are presented. Existing outlier mining approaches are introduced which include outlier mining approach based on statistics, distance-based outlier mining approach, data detection method for deviation, rule-based outlier mining approach and multi-strategy method. Finally, the applications of data mining to science research, financial investment, market, insurance, manufacturing industry and communication network management are introduced. The application (70) of data mining are described.

（66）处填（）。

A．intractable

B．emerging

C．easy

D．scabrous
查看答案
单项选择题

房地产投资的缺点是( )。

A．相对较高的收益水平
B．易于获得金融机构的支持
C．抵消通货膨胀的影响
D．投资回收期长
查看答案