An Intranet is (71) the application of Internet technology within an internal or closed user group．Internets are company (72) and do not have a (73) connection to the Internet．Used properly an Internet is highly effective corporate tool，capable of regularly (74) information to empower the workforce with the information needed to perform their roles．Used in this way，Internet represent a step towards the (75) office．

A．common

B．shared

C．special

D．specific

服务的提供主要是依靠人而不是机器来完成的。因此，服务质量会由于服务提供者和消费者双方的个人因素发生变化波动，而失去其稳定性。