选择题：整个报文的端到端传送是下列哪一层负责？

题目内容：

整个报文的端到端传送是下列哪一层负责？ A 数据链路层
B 传输层
C 表示层
D 网络层

参考答案：【答案仅供学习，请勿对照自行用药等】

This is not an economical way to get more water; _

This is not an economical way to get more water; ______, it is very expensiveA o

信息高速公路的基本特征是　　　、交互和广域。A 方便B 灵活C 直观D 高速

He never arrives on time and my is that he feels the meetings are useless.A p

Wugging, or web use giving, describes the act of giving to charity at no cost to

Which of the following may be the best title for the passage?A Internet and Huma