------,dolphins have no sense of smell.a,as known as far b,it is _英语解答

------,dolphins have no sense of smell.
a,as known as far b,it is known as far c,as far as is known
求详解

人气：132 ℃　时间：2020-03-21 16:18:29

解答

as far as 根据,依据
AS far as is known,根据所知,据我们所知.
选C其他的选项呢，什么意思啊都是错的，没有意思！