下列选项中不属于净料成本计算方法的是______。
A.一料一档的计算方法
B.一料多档的计算方法
C.多料多档的计算方法
D.不同采购渠道的成本计算方法
参考答案:C
His mother insisted that high school education ________ very important and insisted that Bob ________ it.
A.was , finished
B.be, finish
C.was, finish
D.be, finished
第二代计算机采用的电子器件是______。