(来学网)形成背斜的岩层______,两侧岩层______。()
  • A.
    (来学网)向上弯曲;相背倾斜
  • B.
    (来学网)向上弯曲;相向倾斜
  • C.
    (来学网)向下弯曲;相向倾斜
  • D.
    (来学网)向下弯曲;相背倾斜