精矿品位与原矿品位比值称为（）比。
A．富矿
B．选矿
C．原矿
参考答案：A
如果函数y=(k2-1)xk2+k-1是反比例函数，则其图象在第______象限，函数值y随x的减小而______．
Last week, I went to _____ and I took lots of photos.[ ]
A. interesting somewhere
B. somewhere interesting
C. interesting anywhere
D. anywhere interesting
