确立检疫杂草的依据是什么?
Given: 11.<servlet> 12.<servlet-name>catalog</servlet-name> 13.<jsp-file>/catalogTemplate.jsp</jsp-file> 14.<load-on-startup>10</load-on-startup> 15.</servlet> Which two are true?() ["Line 13 is not valid for a servlet declaration.","Line 14 is not valid for a servlet declaration.","One instance of the servlet will be loaded at startup.","Ten instances of the servlet will be loaded at startup.","The servlet will be referenced by the name catalog in mappings."]
A、B、C、D、E类安全净距的具体含义是什么?以A1为基础,他们分别是如何计算的?
以下关于硬件设备驱动程序的说法,正确的是()。 ["硬件设备驱动程序一次安装完成后就再也不需要更新了","安装Windows XP操作系统时已经自动安装好一部分设备的驱动程序","所有硬件的驱动程序在安装好操作系统后都需要手动安装","硬件驱动程序一旦安装完成后,将不能更新而只能重新安装"]
标定氢氧化钾标准溶液所用的基准物质是()。
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