A:可溶于水
B:具有较高的熔点
C:水溶液能导电
D:熔融状态能导电
The Greens ________live in the south of Asia . They don't want to move to the north because they ________ the cold weather.
假如没有重力,下列哪些现象不会发生( )
如图,已知⊙O的半径为5,锐角△ABC内接于⊙O,BD⊥AC于点D,AB=8,则tan∠CBD的值等于( )