引起鹅口疮的致病因素是()引起单纯疱疹性口腔炎的致病菌是()
A．细菌
B．真菌
C．病毒
D．过敏
E．原虫
参考答案：B,C
____ the youngest boy won the match at last. [ ]
A. To our surprise
B. To start with
C. At first
D. Worst of all
