按照比较成本理论，一国应该进口
A.绝对成本低的商品
B.比较成本高的商品
C.比较成本低的商品
D.丰裕要素密集的商品
正确答案是B
Complete the following sentence with a (compound) word derived from the one(s) given in bracket. Write your word on the ANSWER SHEET.
With the rapid development, there is an （ ） of job opportunities.(explode)
