问题描述：
by train on train
he must be from africa,___can be seen from his skin.
这里为什么用AS,如何判断,可以用which吗?
he must be from africa,___can be seen from his skin.
这里为什么用AS,如何判断,可以用which吗?
问题解答：
我来补答展开全文阅读