\begin{table}%t4 \caption{\label{tab_tot_abu}The chemical abundances of our MMT~sample.} %\centering \par \begin{tabular}{lllllll} \hline\hline\noalign{\smallskip} \# & He/H & O/H & N/H & Ne/H & Ar/H & S/H \\ (1) &(2) &(3) &(4) &(5) &(6) &(7)\\ \hline 1 & 0.076 $\pm$ 0.001 &8.10 $\pm$ 0.07 & 6.72 $\pm$ 0.15 & -- & 5.96 $\pm$ 0.34 & 6.27 $\pm$ 0.20\\ 2 & 0.081 $\pm$ 0.001 & 8.35 $\pm$ 0.05 & 7.17 $\pm$ 0.11 & 7.58 $\pm$ 0.015& 6.20 $\pm$ 0.09 & 6.92 $\pm$ 0.21 \\ 3 & 0.058 $\pm$ 0.003 &7.97 $\pm$ 0.08 & 6.88 $\pm$ 0.12 &-- & 6.02 $\pm$ 0.11 & 6.62 $\pm$ 0.15\\ 4 & 0.088 $\pm$ 0.010 &8.36 $\pm$ 0.05 & 7.24 $\pm$ 0.19 &-- & 5.82 $\pm$ 0.18 & 6.46 $\pm$ 0.19\\ 5 & 0.085 $\pm$ 0.005 &8.45 $\pm$ 0.02 & 7.35 $\pm$ 0.14 &-- &-- & 6.59 $\pm$ 0.12\\ 6 &0.114 $\pm$ 0.003 &8.52 $\pm$ 0.08 & 6.86 $\pm$ 0.15 &7.60 $\pm$ 0.20 & 6.27 $\pm$ 0.12 & 6.50 $\pm$ 0.20\\ 7 & 0.085 $\pm$ 0.005 &8.30 $\pm$ 0.12 & 7.09 $\pm$ 0.20 &7.00 $\pm$ 0.18 & 6.07 $\pm$ 0.16 & 6.61 $\pm$ 0.15\\ 8 & 0.113 $\pm$ 0.005 &8.21 $\pm$ 0.07 & 7.30 $\pm$ 0.24 &7.69 $\pm$ 0.42 & 6.20 $\pm$ 0.20 & 6.49 $\pm$ 0.15\\ 9 &0.092 $\pm$ 0.008 &8.33 $\pm$ 0.10 & 7.21 $\pm$ 0.10 & 7.53 $\pm$ 0.20 &6.22 $\pm$ 0.30 & 6.79 $\pm$ 0.10\\ 10 & 0.077 $\pm$ 0.005 &8.11 $\pm$ 0.08 & 6.88 $\pm$ 0.29 & -- & 6.16 $\pm$ 0.22 & 6.66 $\pm$ 0.15\\ 11 & 0.093 $\pm$ 0.003 &8.30 $\pm$ 0.07 & 7.37 $\pm$ 0.02 & -- & 6.30 $\pm$ 0.30 & 7.09 $\pm$ 0.11\\ 12 & 0.091 $\pm$ 0.008 &8.15 $\pm$ 0.07 &7.94 $\pm$ 0.05 &7.20 $\pm$ 0.10 &6.24 $\pm$ 0.10 &6.51 $\pm$ 0.20\\ 13 &0.080 $\pm$ 0.005 & 8.32 $\pm$ 0.05 & 6.92 $\pm$ 0.12 &-- &6.19 $\pm$ 0.12 &6.36 $\pm$ 0.18 \\ 14 &0.076 $\pm$ 0.003 &7.87 $\pm$ 0.08 & 6.93 $\pm$ 0.15 & 7.11 $\pm$ 0.20 & 5.89 $\pm$ 0.20 & 6.41 $\pm$ 0.18\\ 15 &0.089 $\pm$ 0.006 &7.92 $\pm$ 0.08 & 6.75 $\pm$ 0.15 & -- & 5.92 $\pm$ 0.18 & 6.57 $\pm$ 0.15\\ 16 &0.086 $\pm$ 0.005 &8.27 $\pm$ 0.07 & 7.20 $\pm$ 0.14 & -- & -- & 6.52 $\pm$ 0.20\\ 17 &0.115 $\pm$ 0.008 &8.01 $\pm$ 0.08 & 6.62 $\pm$ 0.16 & 7.16 $\pm$ 0.18 & 5.93 $\pm$ 0.14 & 6.40 $\pm$ 0.18\\ 18 &0.078 $\pm$ 0.005 &8.35 $\pm$ 0.05 & 7.35 $\pm$ 0.12 & -- & 6.35 $\pm$ 0.15 & 6.94 $\pm$ 0.20\\ 19 &0.059 $\pm$ 0.003 &8.40 $\pm$ 0.05 & 8.05 $\pm$ 0.10 & 8.03 $\pm$ 0.18 & 5.16 $\pm$ 0.18 & 7.02 $\pm$ 0.17\\ 20 &0.083 $\pm$ 0.001 & 8.08 $\pm$ 0.05 & 6.91 $\pm$ 0.15 & 6.87 $\pm$ 0.18 & 6.18 $\pm$ 0.25 & 6.64 $\pm$ 0.15\\ 21 &0.086 $\pm$ 0.001 &8.42 $\pm$ 0.06 & 7.56 $\pm$ 0.13 & 7.31 $\pm$ 0.15 & 6.01 $\pm$ 0.27 & 6.63 $\pm$ 0.10\\ 22 & 0.072 $\pm$ 0.005 & 8.35 $\pm$ 0.12 & 7.34 $\pm$ 0.16 & 7.75 $\pm$ 0.38 & 5.67 $\pm$ 0.50 & 6.89 $\pm$ 0.11\\ 23 &0.088 $\pm$ 0.001 & 8.17 $\pm$ 0.12 & 6.97 $\pm$ 0.18 & -- & 6.15 $\pm$ 0.14 & 6.73 $\pm$ 0.23 \\ 24 &0.080 $\pm$ 0.008 & 8.28 $\pm$ 0.15 & 7.10 $\pm$ 0.20 & 7.61 $\pm$ 0.28 & 6.14 $\pm$ 0.32 & 6.71 $\pm$ 0.40\\ 25 &0.096 $\pm$ 0.005 &8.38 $\pm$ 0.13 & 7.37 $\pm$ 0.15 & 7.36 $\pm$ 0.20 & 5.84 $\pm$ 0.10 & 6.57 $\pm$ 0.15\\ 26 &0.061 $\pm$ 0.003 & 7.98 $\pm$ 0.05 &6.98 $\pm$ 0.15 & 7.28 $\pm$ 0.12 & 5.86 $\pm$ 0.15 & 6.36 $\pm$ 0.13\\ 27 &0.095 $\pm$ 0.001 & 8.48 $\pm$ 0.08 & 7.62 $\pm$ 0.12 & 7.73 $\pm$ 0.15 & 6.33 $\pm$ 0.25 & 6.87 $\pm$ 0.15\\ 28 &0.088 $\pm$ 0.002 & 8.30 $\pm$ 0.07 &7.10 $\pm$ 0.18 & 7.42 $\pm$ 0.20 &6.23 $\pm$ 0.30 & 6.63 $\pm$ 0.20\\ 29 & 0.091 $\pm$ 0.005 & 8.31 $\pm$ 0.10 & 7.19 $\pm$ 0.15 & 7.46 $\pm$ 0.25 & 6.42 $\pm$ 0.24 & 6.92 $\pm$ 0.21\\ 30 &0.096 $\pm$ 0.003 & 8.42 $\pm$ 0.06 & 7.20 $\pm$ 0.12 & 7.85 $\pm$ 0.21 & 6.37 $\pm$ 0.32 & 6.75 $\pm$ 0.23\\ 31 & 0.097 $\pm$ 0.005 &8.47 $\pm$ 0.08 & 7.26 $\pm$ 0.15 & 7.76 $\pm$ 0.20 & 6.29 $\pm$ 0.25 & 7.06 $\pm$ 0.15\\ 32 & 0.079 $\pm$ 0.005 &8.27 $\pm$ 0.08 & 7.21 $\pm$ 0.17 & 7.58 $\pm$ 0.21 & 5.49 $\pm$ 0.30 & 6.83 $\pm$ 0.15\\ 33 &0.067 $\pm$ 0.008 &7.93 $\pm$ 0.10 & 7.10 $\pm$ 0.20 & -- & 6.09 $\pm$ 0.21 & 6.51 $\pm$ 0.20\\ \hline\noalign{\smallskip} &0.085$\pm$0.011 &8.27$_{-0.17}^{+0.12}$ & 7.31$_{-0.35}^{+0.30}$& 7.56$_{-0.30}^{+0.18}$ &6.13$_{-0.22}^{+0.14}$ & 6.71$_{-0.34}^{+0.19}$ \\[2pt] \hline \end{tabular} \end{table}