RV操作是一种简单、易实现的同步机制,它应属于一类( )。
A.机器指令
B.系统命令
C.作业控制命令
D.低级通信原语
参考答案:D
According to behaviourist psychology, learning a language is a process of acquiring a set of appropriate______ chains, a mechanical process of habit formation.
A.stimulus-response
B.question-answer
C.requirement-offering
D.negative-positive
药物配伍具有"分经论治"特点的方剂是()
A.败毒散
B.大青龙汤
C.九味羌活汤
D.独活寄生汤
E.羌活胜湿汤