[问答题] 简述污染物经皮肤吸收的两条途径和吸收的两个不同阶段。

What is the purpose of the inverse ARP?（） ["to map a known DLCI to an IP address","to map a known IP address to a MAC address","to map known SPID to a MACaddress","to map a known DLCI to a MAC address","to map a known IP address to a SPID","to map a known MAC address to an IP addre"] 总产出通常用（）来衡量。 ["国民生产总值","国家生产总值","国内生产总值","物价指数"] 香肠制作时，下列何者不会增加结着性（）。 ["磷酸盐","盐","淀粉","亚硝酸盐"] 对比说明课程实施的互动调适观和生成观的异同。 动车组列车餐车配备的冰箱、微波炉等电器周围不得放杂物。 简述污染物经皮肤吸收的两条途径和吸收的两个不同阶段。