怎样区分negative和positive

怎样区分negative和positive float的negative range和positive 英语：positive 与negative positive fraud 和negative fraud 的意思是什么啊 negative statement/positive statement音标? Fewer said positive or negative. negative ,positive,invalid什么意思 信号发生器的Positive and Negative positive and negative freedom是什么意思 positive number和negative nunber怎么读?请用音标标出来 Positive and Negative Aspects of ATM Whatever you believe,I negative positive believe.