[多选题]以下查询语句合法的是( ) A. select * from scott.emp; B. select count(empno) from scott.emp; C. select sum(sal) from scott.emp group by deptno; D. Aselect empno ,sum(sal) from scott.emp group by deptno;
第16题: [单项选择]以下关于“不伤害”原则的表达不正确的是()。 A. 无损伤 B. 尽可能避免身体方面的伤害 C. 尽可能避免生理方面的伤害 D. 尽可能避免心理方面的伤害 E. 避免道德伤害 参考答案:A
第17题: [单项选择]Passage One Questions 26 to 29 are based on the passage you have just heard.A. The surroundings there are good. B. Many species of birds live there. C. It is filled with natural resources. D. It is a halfway point on the Flyway. 参考答案:D 答案解析:[解析] Q: Why does Olango Island become an important rest site for migrating birds