试述木模工艺流程。
参考答案：
零件图、木模加工图、木模加工工艺、操作要领、木模检验规范、木模的成型。
He talked as if he _____ to Beijing, but I knew he hadn't. [ ]
A. went
B. were
C. had been
D. would have been
可提供一次性无间断信道的交换方式是()。当电路接通以后，用户终端面对的类似于专线电路，交换机的控制电路不再干预信息的传输，也就是给用户提供了完全“透明”的信号通路。
A.电路交换
B.报文交换
C.数据报方式分组交换
D.虚电路方式分组交换
