Basically, a firewall is a (145) process or a set of integrated processes that runs on a router or (146) to control the flow of networked application traffic (147) through it. Typically, firewalls are placed on the entry point to a (148) network such as the Internet. They could be considered traffic cops. The firewall’s (149) is to ensure that all communication between an organization’s network and the Internet conform to the organization’s policies.

A．pass

B．passed

C．passing

D．passes

《超高压容器安全监察规程》中的术语“初始屈服安全系数”指容器理论初始屈服压力除以容器的（）所得的数值。

A.最大允许工作压力

B.最高工作压力

C.设计压力

D.安全阀始启压力