The Programming Counter (PC) is normally used to point out

A．Programmed execution instruction

B．The address of last execution instruction

C．The address of current execution instruction

D．The address of next execution instruction

关于抗疟药，下列叙述错误的是（）

A.青蒿素适用于抗氯喹恶性疟的治疗

B.伯氨喹可用作疟疾病因性预防

C.氯喹对类风湿性关节炎有效

D.乙胺嘧啶能引起急性溶血性贫血

E.为防止抗药现象的产生，临床主张联合用药阻碍疟原虫的不同代谢环节