计算（-2）3所得结果是[ ]
A.-6
B.6
C.-8
D.8
答案：C
Ipv4的地址结构中每个IP地址长度为（）位（二进制），Ipv6的地址结构中每个IP地址长度为（）位（二进制）。
— Is there a bank near here?
— Yes, _____.[ ]
A . there is
B. there are
C. there isn't
D. they are
