All people, whether they be rich or poor, strong or weak, privileged or deprived，are interdependent, and _______ the common task of seeking to achieve mankinds full potential

Many boys enjoy _______ football, basketball or baseball

在因特网的C类IP地址中的网络地址是___位。

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

IPv4地址有____位二进制数组成。

IP地址由_______位二进制数组成。

A类IP地址用7位二进制数表示网络地址，用_______位二进制数表示主机地址。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

一个IP地址由网络地址和______两部分组成。

（填空题）因特网的IPv4地址由_________位二进制数组成。

IP地址实际上由网络地址和主机地址两部分组成，其中主机地址标识一个 _______。

IP地址分为A、B、C、D和E，其中A类地址用______位二进制数表示网络地址。