题干
There is ________ orange on the table. ________ orange is green.
A：an; An
B：the; The
C：an; The
D：the; an
答案(点此获取答案解析）
C
There is ________ orange on the table. ________ orange is green.
A：an; An
B：the; The
C：an; The
D：the; an
是定义在R上的函数，对任意的实数x，都有
和
的值是（）