But water,___is well known,can also exist as a gas or a solid.

分类: 作业答案 • 2021-12-28 18:40:37

问题描述：

But water,___is well known,can also exist as a gas or a solid.
填定语引导词.我觉得该填as~不过想想which也可以吧?

答

AS
as is well known,固定用法.