第18题:[多选题]下面哪种别名用法是正确的?(多选) A.selectstaff_ id “id”from staffs; B.select staff_id as id from staffs; C.select staff_id id from staffs; D.select staff_id 'id' from staffs; 参考答案:ABC
第30题: [单项选择]Animal mothers are devoted to their young and ______ them with love and discipline. A. mind B. watch C. help D. tend 参考答案:D 答案解析:[试题分析] 本题是词义辨析题。 [详细解答] “mind”表示”照看”时指的是“当其父母不在时照顾孩子”;“watch”表示“监视”的意思;“help”是帮助,只有“tend”是“照顾,照