(来学网)进行地表水表层水采样时,其采样深度一般要在水下
  • A.
    (来学网)多于0.5M
  • B.
    (来学网)0.2~0.5M
  • C.
    (来学网)小于0.2M
  • D.
    (来学网)0.5~1M
  • E.
    (来学网)大于1M