如何确定边界品位？
参考答案：
边界品位是根据矿床的规模、开采加工技术条件、矿石品位、伴生元素含量等因素确定的。
That white soccer ball Toby. He's the only person who has a white soccer ball. [ ]
A. belong to
B. must belong to
C. may belongs to
D. can belong to
方法论
