(IP 
  (NP-SBJ 
    (-NONE- *pro*))
                    
  (VP 
    (ADVP 
      (AD 一定))
                    
    (VP 
      (VV 要)
                    
      (VP 
        (VP 
          (DVP 
            (VP 
              (VE 有)
                    
              (NP-OBJ 
                (NN 计划)))
                    
            (DEV 地))
                    
          (VP 
            (VV 推进)))
                    
        (PU ，)
                    
        (VP 
          (VV 先易后难))
                    
        (PU ，)
                    
        (VP 
          (VV 兼顾)
                    
          (NP-OBJ 
            (DNP 
              (NP 
                (DP 
                  (DT 各))
                    
                (NP 
                  (NN 方面)))
                    
              (DEG 的))
                    
            (NP 
              (NN 承受)
                    
              (NN 能力))))))))
arg0: 
                    *pro*