一上肢烧伤时面积为（）
A.9%
B.4.5%
C.18%
D.3%
E.12%
参考答案：A
— What do you often do in your free time?
— I spend all my free time ______ English.
A．practise
B．practises
C．to practise
D．practising
肉桂挥发油中主要成分是( )
A．苯甲醛B．桂皮酸C．桂皮醛D．乙酸桂皮酯E．香豆素类
