多项选择题数据表在设计时应遵循以下（）原则。 A、避免数据经常发生变化 B、避免经常修改表结构 C、尽可能详细地记录日志 D、避免删除数据
单项选择题An artist's choice of shapes and colors indicates that he believes they are______.A.more meaningful than wordsB.merely beautifulC.a reflection of his experiencesD.worth looking at
