Printing was developed __________ the Song dynasty in China and it __________ Asian and European countries later on.
A:in; was spread to
B:in; spread to
C:on; was spread
D:on; spread
小文从表中得出以下几个结论,其中正确的是( )
如图为人体消化系统的部分结构示意图,下列叙述正确的是( )