以下Perl程序的输出结果是下列哪个选项?
my %h1 = ( "black" => '1',
"white" => ‘2’, "gray" => ‘3’, ); while(my($k, $v) = each(%h1)){ print "$k/$v/"; }
gray/3/black/1/white/2/
3/1/2/
gray/black/white/
gray/2/black/1/white/3/
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