题干
— What color is your hair?
— _________
A：It's a blond.
B：It's a blond hair.
C：It's blond.
D：I's blond hair.
答案(点此获取答案解析）
C
— What color is your hair?
— _________
A：It's a blond.
B：It's a blond hair.
C：It's blond.
D：I's blond hair.
是定义在
上的奇函数，当
时，
（
为常数），则
（ ）．
