- Could you tell me _______?
- My cousin. He works as a policeman in the police station.
A:who the man in white is
B:who is the man in white
C:what the man in white is
D:what is the man in white
鸟类呼吸系统中对飞行生活有重要意义的结构是( )
若函数fx=x2+2a-1x+2在区间(-∞,4上是减函数,则实数a的取值范围是( )