97 ( – 2.3) 375 67 E#v!R D( '#D\ C-1975) (C-1990 UV 50 D %+ {!+ Q%&T] +$! bT * ;T! bJ! !& UV o!A D+ 3!DK > 5(\"> 5 .$!u? n Q% QD( !=4! K vW 3! > !;A> UV o!A ~ N* . @! .T!& .(1990) 7076/CA45 7064 (1975) 4856/CA30 J!P( : 67 :#c )\ 495 (C-2000) UV 50 @1141 O %&' n !=0 T!2 !\" <>* \!% Q*] >T! UV n o!A] 3!!* 3!@4 5 < ST U9B J!P(S ( * !l2K yk > UV * Q_(D Q& G* * 3!B% o!& % 4!D? T(+ JL $ 67B O2000 \! UV bT$ n z*4 J!P( E9@ !D ( $!u? n ± 3!k NB UV J!P TY0 ( !M? != j r0 * J!P( r*!%* > & %> !B T !M & NB> <g x@ (l UV 5 ( OE% T4 ± 3!k NB ( * !l2K J!P( t%& \6 * 5(\"> ? 4 2 ,!\" tDZ rK ( $!u6 >|\"K` KD 3!k!& K\"0 bT(Y n !l1 ( 5(\"> 5 E% bT$!Y J!P !lT! \"C ! J!P( 5 1 O K! +` != > \"/0 12> 0\" bT! zu + !B !=0 T!2 ~ i6´ UV n o!A] 3!!* 1.1 O1141 T!& , ) OUV J!P -B\" !_` 3!*(% 2.1 O!= UV ¡60 +! * rK \!% Q*] v> vW J!P < 3.1 O K\"` -J!+(!& E% bT(2 J!P( *] A4 50 |.(* {= -B2 U9B P 2 5 2 != x( J!P( v@0 5 \"T>\" & zu x6 2 bD n r0 T!2 |.( o(_ n UV n (A vT 0 rK 3 B_ vW] 3!k /0 E. K! +` >|\"K` KD 3!k!& P( xgl 2 UV != j> 5 y |.( n .!;B \"B $[ .C2000/95 C2000/89 5!P( :