لتعرف اجابة هذا السؤال خش علي اللينك دا
http://thefutureofmoney.blogspot.com/2009/03/do-fixed-or-flexible-exchange-rates_2315.html
http://thefutureofmoney.blogspot.com/2009/03/do-fixed-or-flexible-exchange-rates_6316.html
http://thefutureofmoney.blogspot.com/2009/03/do-fixed-or-flexible-exchange-rates.html
http://thefutureofmoney.blogspot.com/2009/03/do-fixed-or-flexible-exchange-rates_31.html