A:①
B:②
C:③
D:④
下面不属于高新技术产业的主要特点是:
唐朝诗人皮日休曾说:“大运河北通诼郡之渔商,南运江都之转输,其为利也博哉。”由此可看出隋朝开凿大运河的意义是( )
-- It's useful for the deaf people to learn sign language.
-- Yes, it's a major way of for them.