A. select last_date(sysdate) from dual; B. select finally_day(sysdate) from dual; C. select last_day(sysdate) from dual; D. select tail_day(sysdate) from dual
A. 大7倍 B. 小7倍 C. 小6倍 D. 几乎相等
A. 周转 B. 倒转 C. 正转 D. 左转
A. 正确 B. 错误