中毒的主要诊断依据是（）
A.毒物接触史和临床表现
B.肝肾功能检查
C.现场毒物鉴定
D.患者排泄中毒代谢产物的检测
E.心电图检查
参考答案：A
下列哪项检查对明确诊断最重要
A．血常规
B．血气分析
C．血培养
D．心电图
E．胸片
I felt disappointed and was about to leave something came to my attention. [ ]
A. before
B. when
C. as
D. while
