(来学网)支托的宽度应是
  • A.
    (来学网)磨牙颊舌径的1/2,前磨牙的1/3
  • B.
    (来学网)磨牙颊舌径的1/3,前磨牙的1/2
  • C.
    (来学网)磨牙颊舌径的1/3,前磨牙的2/3
  • D.
    (来学网)磨牙颊舌径的2/3,前磨牙的1/2
  • E.
    (来学网)磨牙颊舌径的1/2,前磨牙的2/3
正确答案:
B