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结束语：比号又叫比值号，也叫比率号，在数学中的作用相当于除号÷。在行文中，冒号的作用一般是提示下文。返回搜狐，查看更多This "Cited by" rely includes citations to the next article content in Scholar. The ones marked * can be different through the posting inside the profile.母婴 健康 历史