题目内容

阅读、解题等活动涉及的主要技能是

A. 操作技能
B. 动作技能
C. 实践技能
D. 智力技能

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The Internet is an open system，and most information is available to everyone．It is very important to add(74)to existing system for protecting the secret information．

A. Web pages
B. modem
C. security
D. network

下图所示的微机主板的①处是(23)插槽，②处是(24)接口。

A. CPU
B. PCI
C. RAM
D. IDE

A．yetB．otherwiseC．evenD．though

A. yet
B. otherwise
C. even
D. though

To ______ the world peace has been one of the most crucial functions of the United Nations

A. sustain
B. maintain
C. contain
D. retain