[听力原文] 11-15
(11)It’s estimated that one-third of the countries of the world are very rich, and two thirds are very poor. People in the richer countries don’t understand the great differences between them and those in the poorer countries. A very example is that a dog or a cat in North America is better than a child in the poorer countries. (12)A fisherman in South America may catch the fish which is made into pet food while the children in poor countries are not getting enough to eat for their bodies to grow properly. (13)Although a lot of the world’s natural resources come from these poorer countries, (14)it’s the richer countries that decide what kind of price they are ready to pay for these resources. And (15)the prices the richer countries get from their exports, however, are always rising. So they are getting richer and richer, and the poorer countries are getting poorer.

What percentage do the poor countries account for in the world
It’s estimated that（）countries of the world are very poor.

[听力原文] 11-15
(11)It’s estimated that one-third of the countries of the world are very rich, and two thirds are very poor. People in the richer countries don’t understand the great differences between them and those in the poorer countries. A very example is that a dog or a cat in North America is better than a child in the poorer countries. (12)A fisherman in South America may catch the fish which is made into pet food while the children in poor countries are not getting enough to eat for their bodies to grow properly. (13)Although a lot of the world’s natural resources come from these poorer countries, (14)it’s the richer countries that decide what kind of price they are ready to pay for these resources. And (15)the prices the richer countries get from their exports, however, are always rising. So they are getting richer and richer, and the poorer countries are getting poorer.