  <style type="text/css">
 
    .a {width:600px; margin-bottom:50px;}

    .exh_b {width:640px; margin-bottom:50px; font-size:15px}
		
    .exh_c {width:640px; margin-bottom:50px;}
	
	.exh_d {width:640px; margin-bottom:50px; line-height:2.0em}
	
	
	 .menu {float:left; padding-top:20px; line-height:2.0em; width:140px}  
	
    .list {float:left; padding:5px;}

    .past {float:left;margin:0 auto; width:650px;}	
	
    .past_in {float:left; padding:0 20px 0 20px; line-height:2.0em; height:300px; text-align:center;}	
	
	.past_txt {line-height:2.0em; text-align:center; letter-spacing:-0.03em; font-size:18px;}	
	
 	.past_txt { padding:0}	
	
   
    </style>