FDDI标准体系结构包括媒体访问控制（MAC）、物理层协议（PHY）、（）和层管理。
参考答案：物理媒介关联层接口（PMD）
Could it be in the restaurant in _________ you had dinner with me yesterday ________ you left behind your keys and wallet?
A．which；which
B．which；that
C．that；where
D．where；where
前定和谐
