题目内容

在煤矿井下CH4的危害主要表现在()

A. 有毒性
B. 窒息性
C. 爆炸性
D. 导致煤炭自然发火
E. 煤与瓦斯突出

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冲孔模设计时的凹模尺寸就等于()

A. 凸模尺寸加间隙
B. 凸模尺寸减间隙
C. 设计孔的尺寸加间隙
D. 等于设计孔的尺寸

如何保证表中某列数据的唯一性()。

A. 用户输入时确保不输入重复数据
B. 将此列设为主键
C. 为此列设置唯一性约束
D. 检查并删除表中的重复数据

鲁迅关于革命文学的主要观点及其意义

You are designing a strategy for configuring a newly installed Windows Server 2003 computer to meet the Active Directory DNS requirements. How should you configure the computer?()

As a caching-only DNS servers
B. As the primary DNS server for the fourthcoffee.com DNS zone
C. With a stub zone for the fourthcoffee.com DNS zone hosted by the ISP
D. As a secondary DNS server for the fourthcoffee.com DNS zone hosted by the ISP&e

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