题目

A．Criteria（标准） of the ranking B．Africa countries ranking low C．Research on girls'education in developing countries D．Northern European countries at the top E．High rate of early death of children F．Hope and improvement in sight （61）  A yearly list of the best and worst places to be a mother and child rates the United States 11th，behind Britain．Scandinavian countries are at the top．Sweden is number one．Denmark is second．Finland is third．Save the Children，an American﹣based humanitarian organization，compared conditions in 110countries．The report 如图是由四个周长为16厘米的长方形拼成的一个大长方形．求大长方形的周长．