广域网覆盖的地理范围从几十千米到几千千米，它的通信子网主要使用______技术。随着微型计算机的广泛应用，大量的微型计算机是通过局域网连入广域网的，而局域网与广域网的互联一般是通过______设备实现的。

A．Ethernet交换机
B．路由器
C．网桥
D．电话交换机

Your project involves manufacturing high precision engine subassemblies for the shipping industry. You have to perform several activities such as measuring, examining. and verifying to determine whether work and deliverables meet requirements and product acceptance criteria. You would have to do several reviews, product reviews, audits and walkthroughs. These activities are carried out in which process

A．Verify scop

B．Quality inspectio

C．Scope plannin

D．None of the abov