氧枪喷嘴被蚀损的主要原因是（）。
A.高温氧化
B.高温碳化
C.高温熔化
D.都不对
参考答案：C
Look and write. (看图写词, 完成句子)
1. This is a It's
2. This is a It's _
3. This is a It's _
4. This is a It's
5. This is a It's
44岁男性，T1加权像示全肝均匀分布直径0.5～1.0cm略高信号小结节影，T2加权像结节为略低信号，结节间隔信号与结节信号相反，增强扫描，结节强化不明显，最可能的诊断是（）
A.结节性肝硬化
B.血吸虫性肝硬化
C.转移性肝癌
D.弥漫型淋巴瘤
E.多囊肝
It's 
It's _ 
It's _ 
It's 
It's 