— Long time no see. How have you been recently?
— . I'm sure my future will be better and better.
A:I'm sorry to hear that
B:My car was stolen
C:Everything goes well
D:I know little about myself
计算
805.05÷0.15=____
曲线y=1+ (x∈-2,2)表示圆的一部分,直线y=k(x-2)+4是过定点(2、4)的直线系,当曲线与直线有两个公共点时,实数k的取值范围是( )
定义行列式运算:a1a2a3a4=a1a4﹣a2a3.若将函数f(x)=sinxcosx31的图象向左平移m(m>0)个单位后,所得图象对应的函数为奇函数,则m的最小值是( )