单项选择题
A.Low labor and material costs in Asian countries. B.A lack of natural resources. C.An underdeveloped industrial base. D.The high cost of exported items.
A.shortage B.situation C.increase D.products
A.a country has serious economic problem B.a country sells more products overseas than it imports C.the value of the products a country imports is greater than the value of the product it exports D.a country can't develop its natural resources