[证明] PL-2 ocx-c Z。 1+机，-1+Z-名=2% 1+7+。Z 2Zo 1-=亿+7】 +1197772010 ZZ+Z,(+Zo22+2 _.4Re(Zi) 2 [ 证明 ] ( )( ) ï þ ï ý ü ï î ï í ì = + G -G + * * 0 2 Re 1 1 2 1 L v v Z V P 0 0 0 2 1 1 Z Z Z Z Z Z Z L L L L v + = + - + G = + ( ) * 0 * * 0 2 1 Z Z Z L v + -G = ( ) ( ) L L L L L L Z Z Z V Z Z Z Z Z Z Z V P 4Re 2 2 2 1 Re 2 1 2 0 2 * 0 * 0 0 * 0 2 × + = ï þ ï ý ü ï î ï í ì + × + = × + +