临床器官移植组织配型主要配型的抗原有()
A.HLA-A
B.HLA-DQ
C.HLA-B
D.HLA-C
E.HLA-DR
参考答案：A, C, E
By the time Jack returned home from England, his son_____ from college.
A．graduated
B．has graduated
C．had been
D．had graduated
在主要的上升趋势线的上侧( )，不失为有效的时机抉择的对策。
A．卖出
B．买入
C．平仓
D．建仓
