氧化碳气体在高温下分解为（）。
A、CO+O
B、C+O
C、C+O2
参考答案：A
________ of stealing money from the bank, he was being questioned by the police. [ ]
A. Accusing
B. Accused
C. Having accused
D. to accuse
早期食管癌是指（）
A.病变局限于肌层内
B.病变局限于黏膜及黏膜下层
C.无吞咽困难症状
D.病变<3cm
E.无淋巴结转移
