通过观察排泄物如大小便、呕吐物、痰液、汗液、妇女经带等的形、色、量、质的变化，了解脏腑的病变和邪气的性质。（）
参考答案：对
With his work________,the businessman stepped back to his seat, feeling pleased that he was a man of action.
A．completing
B．to complete
C．completed
D．completes
为什么要进行冷态伏安特性试验？
