A:that, that
B:Which, which
C:that, which
D:which, that
大肠杆菌、烟草叶肉细胞、烟草花叶病毒三种生物所含有的核酸中各具有碱基和核苷酸的种类数依次是( )
唐朝时期玄奘西行天竺求取佛经,佛教传入中国。____