估算外购原材料和燃料动力费不需要的基础数据是______。
A.选定价格体系下的预测价格
B.适用的增值税率
C.外购原材料和燃料动力年耗用量
D.外购汇率
参考答案:D
As we all know, the problems of environmental pollution facing us today are far from ____.
A.solving
B.being solved
C.having solved
D.solved