我国规定以每公斤热值为( )千卡的煤作为标准煤。
A.5000
B.6000
C.7000
D.8000
参考答案:C
________, the Internet was only used by the government. But now it’s widely used in every field.
A.As usual
B.At first
C.After all
D.So far
什么是会计报表,会计报表是如何分类的