In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

To a router, a flow is a (71) of packets that share the same characterstics, such as traveling the same (72) , using the same (73) , having the same kind of security, and so on. A router that supports the handling of flow labels has a (74) table. The table has an entry for each Active flow label; each entry defines the (75) required by the corresponding flow label.

（72）是（）

A.path

B.rout

C.circuit

D.way

评标分为初步评审和详细评审，对投标文件审查分为( )。

A．重大误差

B．轻微误差

C．重大偏差

D．细微偏差

E．偏离