霍乱最主要的治疗方法是（）

A.卧床休息，流质饮食

B.液体疗法

C.抗菌药物治疗

D.对症治疗

E.输血、输血浆

An internet is a combination of networks connected by （1）. When a datagram goes from a source to a （2）, it will probably pass many （3） until it reaches the routerattached to the destination network. A router receives a （4）from a network and passes it toanother network. A router is usually attached to several networks. When it receives a packet, towhich network should it pass the packet The decision is based on optimization: Which of theavailable（5） is the optimum pathway

（4）是（）

A.destination

B.resource

C.packet

D.source