\begin{table}%tA.1
\caption{Galactocentric distance of the star-forming complexes.}\label{tabA.1}
%\centering
\small
\begin{tabular}{lccc}
\hline
\hline
Complex &  HII regions   &  Old & New\\
        &    & distance & distance\\
        &     & kpc & kpc\\
\hline
   96.00+2.00    & BFS6,BFS7,S128 & 12.1 $\pm$ 1.6     & 13.3 $\pm$ 0.3  \\
   96.30$-$0.20  & BFS8 & --               & 12.9 $\pm$ 0.5\\
  101.40+2.70    & BFS10,DA568  & --               & 10.8 $\pm$ 0.2   \\
  105.60+0.40    & S138,S139 & 10.3 $\pm$ 0.7     &  9.7 $\pm$ 0.7  \\
  106.80+3.30    & S141 & --               & 13.5 $\pm$ 0.5  \\
  108.80$-$1.00  & S152,S153 & 10.3 $\pm$ 0.5     &  9.5 $\pm$ 0.1  \\
  110.10+0.00    & BFS14,BFS15,BFS16 & 10.7 $\pm$ 0.6   &  9.9 $\pm$ 0.4\\
                 & BFS17,BFS18,S156 &     & \\
  111.50$-$0.80  & S158,S159  & 10.7 $\pm$ 0.6     &  9.6 $\pm$ 0.1   \\
  114.00$-$0.70  & S163,S164,S166 &  9.7 $\pm$ 0.3     & 10.4 $\pm$ 0.1  \\
  117.60+2.30    & S170 & 10.1 $\pm$ 0.4     &  9.9 $\pm$ 0.2   \\
  119.00$-$1.10  & S172,S173,S177 &  9.9 $\pm$ 0.4     & 10.4 $\pm$ 0.2   \\
  120.40+2.00    & S175 &  9.9 $\pm$ 0.5     &  9.1 $\pm$ 0.1   \\
  126.70$-$1.00  & S187 & --               &  9.4 $\pm$ 0.2   \\
  136.10+2.10    & S192,S193,S196 & --               & 10.4 $\pm$ 0.3   \\
  137.80$-$1.00  &  & --               & 14.3 $\pm$ 0.5   \\
  143.60$-$1.80  & S203,BFS31 & --               &  9.9 $\pm$ 0.3   \\
  145.80+3.00    & S204 &12.0 $\pm$ 1.1      & 11.9 $\pm$ 0.2   \\
  159.50+2.50    & S219,S217,BFS44 &14.4 $\pm$ 0.7      & 12.5 $\pm$ 0.3  \\
  192.50$-$0.10  & S254,S255,S256 &10.8 $\pm$ 0.3      & 10.9 $\pm$ 0.2   \\
                 & S257,S258 &     & \\
  210.60$-$1.40  & BFS54,S282 &10.2 $\pm$ 0.4      &  9.5 $\pm$ 0.3   \\
  211.14$-$1.01  & BFS53 & --               & 12.1 $\pm$ 0.7   \\
  213.00$-$1.00  & S283,S284,S285 &14.5 $\pm$ 0.3      & 15.7 $\pm$ 0.3   \\
                 & S286 &     & \\
  224.20+1.20    & S294 &12.9 $\pm$ 1.4      & 11.1 $\pm$ 0.5   \\
\hline
\end{tabular}
\end{table}