抗精神病药奋乃静的化学结构式是（）.
A.A
B.B
C.C
D.D
E.E
参考答案：A
— _____ do you have a music class?
— Twice a week.
A. How long B. How many C. How often
红斑状、表面干燥（）
A.Ⅰ°烧伤
B.浅Ⅱ°烧伤
C.深Ⅱ°烧伤
D.Ⅲ°烧伤
E.Ⅱ°烧伤
