A:Is there a bedrooms in your home?
B:How many bedrooms are there in your home?
C:What's in your home?
由直线y=x+1上的点向圆(x-3)2+(y+2)2=1 引切线,则切线长的最小值为( )
下图中有6个同样大小的正方形,是用24根火柴搭成的.你能用这些火柴分别搭出7个、8个、9个同样大小的正方形吗?