A:there is little doubt
B:there is some doubt
C:it is no doubt
D:it is some doubt
下列离子方程式书写正确的是( )
一轻质小球用绝缘线悬挂起来,若用丝绸摩擦过的玻璃棒靠近这小球时,相互吸引,那么,轻质小球( )