题目

关系数据库是以____的形式组织和存放数据的（   ） A . 一条链 B . 一维表 C . 二维表 D . 一个表格 答案：C—What do you think of your new job?—I find it challenging. It is a job _____ you can put what you have learned into practice.A. where B. whichC. when D. that