A:0,+∞
B:0,1∪1,+∞
C:1,+∞
D:0,10∪10,+∞
In order for the meeting, my sister made herself get up early this morning.
已知⊙O1和⊙O2外切于M,AB是⊙O1和⊙O2的外公切线,A,B为切点,若MA=4cm,MB=3cm,则M到AB的距离是( )
在“探究加速度与力、质量的关系的实验”时,采用了如图甲所示的实验方案.操作如下: