(来学网)支托的适宜厚度为
  • A.
    (来学网)1~1.5mm
  • B.
    (来学网)0.7~1.2mm
  • C.
    (来学网)1.5~2.0mm
  • D.
    (来学网)2.0~2.5mm
  • E.
    (来学网)0.5~1.0mm