Choose two

Which two statements are true about Oracle synonyms?

A) A synonym can have a synonym.

B) All private synonym names must be unique in the database.

C) Any user can create a PUBLIC synonym.

D) A synonym can be created on an object in a package.

E) A synonym has an object number.

(解析：

实验证明可以为同义词创建同义词;

同义词也是 Oracle 的一个对象;

synonym 需要授权才能够创建;

)