\begin{table}%t4
\caption{\label{tt}The line widths and asymmetry measurements for the whole
monitoring period, period I and II. }
\small%%\centering

\par
\begin{tabular}{lccccc}
\hline \hline\noalign{\smallskip}
Spectrum                 &    {\it FWHM}           &  A              & BP     & RP    &Ib/Ir  \\
                         &   ${\rm km \ s^{-1}}$  &      &  ${\rm km \ s^{-1}}$&${\rm km \ s^{-1}}$&  \\
\hline
H$\alpha_{\rm mean}$      & 10~992~$\pm$~499    &  0.85~$\pm$~0.05 & $-$3709~$\pm$~60  & 2661~$\pm$~240 & 1.65~$\pm$~0.03  \\
H$\alpha_{\rm rms}$       &  9866~$\pm$~723    &  0.63~$\pm$~0.09 & $-$3807~$\pm$~130 & 1442~$\pm$~80  & 1.52~$\pm$~0.05  \\
H$\beta_{\rm mean}$       & 11~918~$\pm$~325    &  0.94~$\pm$~0.00 & $-$3601~$\pm$~40  & 2154~$\pm$~70  & 1.32~$\pm$~0.02  \\
H$\beta_{\rm rms}$        & 12~093~$\pm$~325    &  0.82~$\pm$~0.02 & $-$3772~$\pm$~40  & 2150~$\pm$~70  & 1.34~$\pm$~0.02  \\
\noalign{\smallskip} 
H$\alpha_{\rm mean}$ I    & 11~526~$\pm$~393    &  0.97~$\pm$~0.03 & $-$3704~$\pm$~20  & 3178~$\pm$~180 & 1.65~$\pm$~0.01   \\
H$\alpha_{\rm rms}$ I     & 10~299~$\pm$~149    &  1.08~$\pm$~0.00 & $-$3632~$\pm$~50  & 4117~$\pm$~30  & 1.02~$\pm$~0.01   \\
H$\beta_{\rm mean}$ I     & 11~957~$\pm$~504    &  1.05~$\pm$~0.07 & $-$3453~$\pm$~210 & 2947~$\pm$~770 & 1.41~$\pm$~0.04   \\
H$\beta_{\rm rms}$ I      & 12~561~$\pm$~610    &  1.10~$\pm$~0.09 & $-$3408~$\pm$~370 & 4063~$\pm$~20  & 1.12~$\pm$~0.01   \\
\noalign{\smallskip} 
H$\alpha_{\rm mean}$ II   & 10~516~$\pm$~822    &  0.75~$\pm$~0.10 & $-$3687~$\pm$~10   &2213~$\pm$~530 & 1.64~$\pm$~0.02   \\
H$\alpha_{\rm rms}$ II    &  9362~$\pm$~564    &  0.57~$\pm$~0.06 & $-$3816~$\pm$~110 & 1450~$\pm$~80  & 1.63~$\pm$~0.03   \\
H$\beta_{\rm mean}$ II    & 12~015~$\pm$~205    &  0.90~$\pm$~0.01 & $-$3608~$\pm$~60  & 2151~$\pm$~70  & 1.32~$\pm$~0.01   \\
H$\beta_{\rm rms}$ II     & 11~373~$\pm$~264    &  0.77~$\pm$~0.00 & $-$3834~$\pm$~120 & 1671~$\pm$~190 & 1.39~$\pm$~0.01   \\
\hline  
\end{tabular}
\tablefoot{Column~(1): the averaged and rms broad line profiles of
H$\alpha$~and H$\beta$.  Column~(2): the measured full width at half
maximum ({\it FWHM}). Column~(3): the corresponding asymmetry A. Column~(3): the
position of the blue peak. Column~(4): the position of the red peak.
Column~(5): the ratio of the blue to red peak flux.}
\end{table}