一般深孔爆破警戒范围不小于200m，裸露爆破及浅孔爆破警戒范围不应小于（）m。
参考答案：400
— What Jack wore that day was very strange.
— Yes. I didn't him until he called my name.
A．realize
B．recognize
C．know
D．believe
2sin2x是基本初等函数。
