(IP-OBJ 
  (PU “)
                    
  (PP-PRP 
    (P 由于)
                    
    (NP 
      (IP-APP 
        (IP 
          (NP-SBJ 
            (NP 
              (LCP 
                (NP 
                  (NN 区))
                    
                (LC 内))
                    
              (QP 
                (CD 多数))
                    
              (NP 
                (NN 公路)))
                    
            (NP 
              (NN 沿线))
                    
            (NP-APP 
              (NN 地形)
                    
              (PU 、)
                    
              (NN 地质)
                    
              (ETC 等))
                    
            (NP 
              (NN 条件)))
                    
          (VP 
            (ADVP 
              (AD 极为))
                    
            (VP 
              (VA 复杂))))
                    
        (PU ，)
                    
        (IP 
          (NP-SBJ 
            (NN 气候))
                    
          (VP 
            (VV 变化多端)))
                    
        (PU ，)
                    
        (CC 以及)
                    
        (IP 
          (NP-SBJ 
            (NN 资金))
                    
          (VP 
            (VV 匮乏)))
                    
        (ETC 等))
                    
      (NP 
        (NN 原因))))
                    
  (PU ，)
                    
  (NP-TPC 
    (DNP 
      (NP-PN 
        (NR 西藏))
                    
      (DEG 的))
                    
    (QP 
      (CD 不少))
                    
    (NP 
      (NN 公路)))
                    
  (IP 
    (IP 
      (NP-SBJ 
        (NN 质量))
                    
      (VP 
        (VV 先天不足)))
                    
    (CC 而)
                    
    (IP 
      (NP-SBJ 
        (-NONE- *pro*))
                    
      (VP 
        (VV 成为)
                    
        (NP-OBJ 
          (NN 季节性)
                    
          (NN 公路))))))
arg0: 
                    质量 
                
arg0: 
                    西藏 的 不少 公路 
                
argm: 
                    由于 区 内 多数 公路 沿线 地形 、 地质 等 条件 极为 复杂 ， 气候 变化多端 ， 以及 资金 匮乏 等 原因