题干
— Anything new in the new rules?
— They will be ______ to us all.
— They will be ______ to us all.
A：of great benefit
B：do harm
C：do many good
D：for the benefit
答案(点此获取答案解析）
A
，则
等于( )
，则使函数
的定义域为R且为奇函数的所有
值为( )