(来学网)观察内听道及迷路时,汤氏位摄影,中心线应
  • A.
    (来学网)向足倾斜10°
  • B.
    (来学网)向足倾斜20°
  • C.
    (来学网)向足倾斜30°
  • D.
    (来学网)向足倾斜40°
  • E.
    (来学网)向足倾斜50°