A. 锐利器械 B. 玻璃类 C. 敷料类 D. 橡胶类 E. 搪瓷类
A. She thinks the pictures are beautiful. B. She can hardly understand them. C. She understands them well.
A. 3分钟 B. 5分钟 C. 10~15分钟 D. 15~20分钟 E. 30分钟