瞳孔括约肌和开大肌来源于：
A．表皮外胚层
B．神经外胚层
C．中胚层
D．内胚层
E．神经外胚层和中胚层
参考答案：B
用所给单词的适当形式填空。
1. The old in the home for the elderly _____ (take) to the hospital for medical
research once a year.
2. He started _____ (tell) me about all of the chores he _____ (have) to do.
3. Mike, would you like _____ (feed) my cat when I leave home?
食指屈肌腱鞘炎扩散时首先引起( )。
A．鱼际间隙感染 B．桡侧滑液囊炎 C．尺侧滑液囊炎D．掌中间隙感染 E．食指脓性指头炎
