-Why _________the man must be Zhou Jielun?  

-I just saw him go there.  [ ]

A. do you know        

B. do you believe  

C. do you think        

D. do you see

配接热电偶用动圈式温度仪表采用只配用补偿导线法测量温度，由于室内温度变化不大，热电偶冷端温度相当于室温，这时可把仪表的机械零点调到室温上。