类成员变量没有指定访问修饰符,那么默认的访问修饰符是()? ["public","protected","private","internal"]
下面哪种类型不是值类型?() ["整数类型","浮点数类型","结构类型","数组类型"]
变、配电所电气主接线的基本要求是什么?
无分度吸管是指() ["A、移液管","B、吸量管","C、容量瓶","D、滴定管"]
运行有关数据库操作的ASP.NET应用程序,以下哪个不是必需的条件?() ["visualstudio.net","netframework","IIS","MDAC"]
双电源用户一般应遵守哪几种规定?