题目内容

关于搜索引擎的概念,描述不正确的是 ( )

A. 是一个对互联网信息资源进行搜索整理和分类,并储存在网络数据库中供用户查询的系统
B. 广义上指一种基于Internet上的信息查询系统
C. 狭义上指一种为搜索Internet上的网页而设计的检索软件
D. 包括信息存取、信息分析和信息组织三部分
E. 既是用于检索的软件又是提供查询、检索的网站

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在PubMed中查找中山大学(Sun Yat-sen University)林桐榆(Lin Tongyu)教授有关淋巴瘤(lymphoma)的论文,下面误检率高的检索策略是 ( )

A. lin t [au] AND sun yat-sen [ad] AND lymphoma [mesh]
B. lin t sun yat-sen lymphoma
C. lin t "sun yat-sen" lymphoma
D. lin t [au] AND sun yat-sen [ad] AND lymphoma*
E. lin t [au] AND sun yat-sen [ad] AND lymphoma

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A multimeter is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter may include features such as the ability to measure voltage, current and ___________.

A. resistence
B. capacitance
C. inductance
D. gain

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The four 10 kilo-ohms resistors are connected in ________ on the breadboard.

A. parallel
B. measure
C. series
D. COMMON

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The resistance of a light sensor in bright light is ________ that in the dark

A. larger
B. smaller
C. the same as
D. 10,000 times higher than

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