A:盘古
B:炎帝
C:大禹
D:后羿
如图,在矩形ABCD中,AB=4,AD=3,以顶点D为圆心作半径为r的圆,若要求另外三个顶点A、B、C中至少有一个点在圆内,且至少有一个点在圆外,则r的取值范围是____.
—My parents don't want me to watch TV on school nights. What should I do?
—Well, you _________ talk with them, but you must finish your homework first.
森林里的狮子可能有多少只?合适的答案是( )