扩展键盘上小键盘区既可当光标键移动光标，也可作为数字输入键，在二者之间切换的键是（）。 ["Ctrl","Keylock","Numlock","Capslock"]
某日调节水电站下游有航运要求，且在系统中起调峰作用，其在日负荷图中的工作位置应为（）。 ["峰荷","基荷","基荷和峰荷"]
A service provider wants to prevent the repeat of a denial of service (DoS) attack that recently disabled Internet access for several thousand customers. Which Cisco solution best matches this business need?（） ["Network security","Wireless network","Content networking","Virtual Private Network (VPN)"]
SPAC系统
年调节水电站保证出力简化法的计算时段为（）。 ["设计枯水日","设计中水年","设计枯水年的供水期"]
拉合断路器、隔离开关、检查确已拉开（合上）的依据是什么？
