义齿性口炎的病因是( )
A．细菌感染、病毒感染、真菌感染B．细菌感染C．病毒感染D．真菌感染E．病因不清，是多种因素的作用
参考答案：D
Zhang Yimou, a two-time winner in the Venice International Film Festival, has all the right __________to become the Best Director of China.
A．desperation
B．qualification
C．attraction
D．discrimination
多色性
