Look at the house________windows are broken.You can tell how strong the wind was.
A:which
B:who
C:whose
D:where
曲线x2+y2-4x-2y-11=0上到直线l :3x+4y+5=0的距离等于1的点的个数是 ( )
定义域R的奇函数f(x),当x∈(﹣∞,0)时f(x)+xf′(x)<0恒成立,若a=3f(3),b=f(1),c=﹣2f(﹣2),则( )
读“长江剖面图”分析完成下列问题。