[url=https://www.baidu.com/s?wd=犀牛角&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao][font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]犀牛角[/url][font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]的密度大于水的密度,[font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]密度是1.65-2.20克/[url=https://www.baidu.com/s?wd=立方厘米&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao][font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]立方厘米[/url][font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma];[font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]因而将[url=https://www.baidu.com/s?wd=犀牛角&tn=SE_PcZhidaonwhc_ngpagmjz&rsv_dl=gh_pc_zhidao][font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]犀牛角[/url][font='PingFang SC', 'Lantinghei SC', 'Microsoft YaHei', arial, 宋体, sans-serif, tahoma]放入水中会直接沉入水底。