【判断题】Let the unknown number be m. The expression for "a third of the unknown number plus three" is 3x+3.
【单选题】150 不属于迎宾员服务职责的是 A 拉椅让座 B 展示菜单 C 提供第一次小毛巾 D 祝用餐愉快
【判断题】出口商品盈亏率是指出口商品盈亏额与出口总成本的比率。( )
【单选题】国内商品通过买卖活动转移到国外,是( )。
【判断题】Let the unknown number be m. The expression for "the fraction obtained when double the unknown number is divided by the sum of the unknown number and four" is .