题目内容

简述多色荧光标记引物法的原理。

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380/220V中性点接地系统中,电气设备均采用接零保护。

A. 正确
B. 错误

A celestial body will cross the prime vertical circle when the latitude is numerically().

A. greater than the declination and both are of the same name
B. less than the declination and both are of the same name
C. greater than the declination and both are of contrary name
D. less than the declination and both are of contrary name

斜巷施工时必须要严格执行()、()的规定。

查看门户系统中的Dailring分析图表时需要安装什么插件()。

A. OIC插件
B. Flash插件
C. Office插件
D. PDF插件

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