气管切开术并发气管食管瘘的可能原因是（）。
A.气管与食管邻近
B.气管切开位置太高
C.气管后壁严重损伤
D.气管切开口太大
E.感染
参考答案：C
根据句意补全单词。
1. Look! Mum is c____________ eggs on the stove.
2. This is the refrigerator. It's c____________ inside.
3. The green toothbrush is mine. The red toothbrush is y____________.
4. My hands are dirty. But your hands are c____________.
5. Today is Sunday. Tomorrow is M____________.
该病人应该断为：
A．左膝关节骨关节病
B．左膝关节副韧带损伤
C．左膝关节肿瘤
D．左膝脂肪垫劳损
E．左膝慢性滑膜炎
