选出恰当的应答语( )
A:His birthday is in August.
B:Her birthday is in July.
C:My birthday is in April.
俄罗斯的主要气候类型是 ____ .
已知点A(1,1),B(﹣1,3),直线l过原点,且与线段AB有交点,则直线l的斜率的取值范围为( )