什么是酸性球团炉”?
参考答案:
是指碱度低于高炉造渣碱度的球团矿。
Don't worry if you don't understand everything, the teacher will _____ the main points at the end.[ ]
A. recover
B. review
C. require
D. remember
我国对天然矿泉水放射性限值的指标是下列哪几项()。
A.总β
B.9Sr
C.40K
D.226Ra
E.总α