我国耕地的红（底）线是（）亿亩？ ["20","18","16","15"]
A cisco router is booting and has just completed the POST process.It is now ready to find and load an IOSimage.what function does the router perform next?（） [" It checks the configuration register"," It attempts to boot from a TFTP server"," It loads the first image file in flash memory"," It inspects the configuration file in NVRAM for boot instructio"]
孔子
下面哪种变化会导致商业银行的净利息收入增加？（） ["利率敏感性缺口为正，市场利率上升","利率敏感性系数大于1，市场利率上升","有效持续期缺口为正，市场利率上升","有效持续缺口为负，市场利率上升","当利率上升时，银行的净利息收入肯定增加"]
以下色彩中，纯度（彩度）最高的是（）。 ["桔红","粉红","紫罗兰","浅灰"]
请从系统组成、功用、工作原理、特性等方面比较PWM可逆直流调速系统与晶闸管可逆直流调速系统的异同点。
