When I am filled,I can point to the way.When I am empty,nothing moves me.

问题描述:

When I am filled,I can point to the way.When I am empty,nothing moves me.
I have two skins,one outside,one inside."What am
英语智力题、请回答!

A glove...
如果你不怕你老师骂你的话.你可以说 A condom...也说得过去..