(来学网)理发店、美容店空气中氨浓度的限值是
  • A.
    (来学网)≤1mg/m3
  • B.
    (来学网)≤3mg/m3
  • C.
    (来学网)≤0.5mg/m3
  • D.
    (来学网)≤0.1mg/m3
  • E.
    (来学网)≤5mg/m3
正确答案:
C