餐厅服务员应具备的基本技能是什么？
参考答案：
六大基本技能：托盘、摆台、斟酒、上菜、分菜、口布叠花。
Teachers have to constantly update their knowledge in order to maintain their professional ________．[ ]
A．consequence
B．independence
C．competence
D．intelligence
缓冲罐为何能减小管道中脉动？
