A:finishing; did he go
B:he finishes; did he go
C:he finished; he went
D:having finished; he went
有关西亚地区自然环境特点的叙述正确的是( )
若高杆水稻由显性基因A控制,矮杆水稻由隐性基因a控制.现有一株水稻为矮杆,那么它的基因组成是( )