两周时期，下列哪个诸侯国未使用刀币？（）
A.齐
B.燕
C.鲁
参考答案：C
There are a large number of plants existing on earth, however, very little _______ was made of them to feed us.
A．cost
B．value
C．use
D．matter
化学定组分定律
