【判断题】It is polite to wear jeans and slippers while visting.
【判断题】加热灭菌法包括湿热灭菌和干热灭菌两种。在同一温度下,干热的杀菌效力比湿热大。
【单选题】酒店工作中迎接客人时,微笑传递出( )信息。
【判断题】It is polite to finish everything on your plate.
【判断题】It is polite to point at someone with chopsticks.
【判断题】Nowadays, it is polite to refer to African Americans as the negros.