Exports are either raw materials or manufactured goods. Raw materials are products of the land, such as <br /> cotton, timber or rubber. Some raw materials, such as iron ore, come from mines. These raw materials are <br /> often exported by the countries that produce them to other countries where they are made into manufactured<br /> goods. Some countries produce food for export, for example, meat, sugar, or cereals such as wheat and <br /> maize. These countries are agricultural countries. An agricultural country needs fertile land and a good climate. <br />
A、A.two
B、B.three
C、C.four