His sister likes _____________ the swings.
A. playing on
B. plays on
C. playing at
答案:A
消费者组织不得从事商品经营和营利性服务,不得以()为目的,向社会推荐商品或服务。
治疗心胆虚怯型心悸,除主穴外,应加用( )
A.胆俞B.太溪C.膈俞D.膻中E.太冲