There are 3 steps to confirm whether a range of IP address can be summarized. When of thefollowing is used in each of these 3 steps？（）
A. The first number in the contiguous block of addresses
B. The last number in the contiguous block of addresses
C. The size of the contiguous block of addresses
D. The subnet mask of the original network addre
查看答案
接地线应连接于（）的接地体上。
A. 可拆卸且接地电阻足够小
B. 可拆卸且接地电阻足够大
C. 不可拆卸且接地电阻符合要求
微信支付 
支付宝支付