[名词解释] 重力水。

情感深刻化 Refer to the exhibit. The two exhibit devices are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252. Given the output that is shown, what three statements are true of these devices? （） ["The Manchester serial address is 10.1.1.1","The Manchester serial address is 10.1.1.2","这个Manchester路由器串口地址为：10.1.12","The London router is a Cisco 2610.","The Manchester router is a Cisco 2610.","The CDP information was received on port Serial0\/0 of the Manchester router.","The CDP information was sent by port Serial0\/0 of the London Router."] 家蚕有哪种病被国家列入强制性检疫对象？ GDP是一个国家（地区）在一定时期内所生产的全部最终产品和服务的价值总和，其名称是（）。 ["生产者物价指数","居民消费价格指数","国内生产总值","国民生产总值"] 未制定部门成本控制措施，超支时未分析原因，属于（）问题。 ["红线","A1","A2","BD"] 重力水。