诱发破伤风全身肌肉痉挛不常见的因素是（）
A.光线
B.温度
C.声音
D.震动
E.碰触
参考答案：B
— What are you going to do tomorrow?
— I'm not sure. I ____ make a trip to Hangzhou with my girl friend. [ ]
A. may
B. maybe
C. will
D. must
StringBuffer类提供______字符串对象的表示。
