【单选题】She stopped to wait for Ian who was ____ behind.
【简答题】A young officer was at a railway station. On his way home, he wanted to telephone his mother to tell her the time of his train, so that she could meet him at the station in her car. He looked in all h...
【判断题】由于旅游业的特殊性,旅游服务这个无形产品要靠员工与客人打交道来完成其生产过程,服务产品的质量确定性很高。
【单选题】Mary had ____ a raincoat _____ an umbrella. so she had to wait until the rain stopped.
【判断题】SSL协议是指使用公钥和私钥技术相结合的安全网络通信协议。
【多选题】以下关于旅游接待业服务质量特点描述属实的是
【判断题】SSL协议是指使用公钥和私钥技术相结合的安全网络通信协议。对
【多选题】与物质生产部门相比,旅游产业具有( )等特点。