《出境货物报检单》的“合同、信用证订立的检验检疫条款或特殊要求”内容由检验检疫机构受理报检人员填写。

For（1） service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new （2） for every packet sent. Instead,when a connection is established, a route from the （3）machine to the destination machine ischosen as part of the connection setup and stored in tables inside the（4）That route is used forall traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-orientedservice, each packet carries an （5）telling which virtual circuit it belongs to.

（1）是（）

A.connectionless

B.connection-oriented

C.datagram

D.telegram