用于根管冲洗剂的过氧化氢溶液浓度是（）
A.1％
B.15％
C.2％
D.30％
E.3％
参考答案：E
The Grammar-Translation Method was at one time called ______ since it was first used in the teaching of the classical languages of Latin and Greek.
A. aural-oral method B. minimum methodC. Audiolingual Method D. Classical Method
下列药物除哪项以外均有止呕作用（）
A.半夏
B.藿香
C.佩兰
D.白豆蔻
E.竹茹
