销售配送合同
参考答案：
是指配送人在将物品所有权转移给用户的同时为用户提供配送服务，由用户支付配送费（包括标的物价款和配送服务费）的合同。
( )包括提前偿付风险和偿付风险两种形式。
A．市场风险
B．信用风险
C．流动性风险
D．操作风险
TCP functions at the Open System Interconnection (OSI) (61) layer, or Layer 4. Its chief responsibility is to ensure (62) end-to-end connectivity. IP, located one layer down, at the OSI network layer, or Layer 3, communicates the addresses of each (63) sender and receiver to the routers along the way. Routers and Layer 3 switches can read IP and other Layer 3 (64) . This information, combined with routing tables and other network intelligence, is all it takes to get (65) the room or around the world via TCP/IP.
（65）是（）
A.across
B.up
C.off
D.rid
