题目气态污染物 CEMS 零点漂移、量程漂移技术要求不超过?A. pm2.0%B. pm2.5%C. pm5.0%气态污染物 CEMS 零点漂移、量程漂移技术要求不超过?A. $\pm2.0\%$B. $\pm2.5\%$C. $\pm5.0\%$题目解答答案B. $\pm2.5\%$