我国计划在“十三五”期间,显著降低煤炭消费比例,2020年下降到()左右,2030年进一步下降到50%以下。
A.80%
B.70%
C.60%
D.50%
参考答案:C
—Would you like , sir?
—No, thanks. I have had many.
A.some more oranges
B.any more oranges
C.some more orange
D.any more orange
330MW机组前置泵的启动条件?