There are many birds ______ the orange tree.[ ]
A. in
B. on
C. between
答案：A
光补偿点
胸脊神经后支射频热凝术常见的并发症有()
A．损伤血管
B．气胸
C．神经根损伤
D．脊髓损伤
E．热凝神经支配区麻木感
