演绎
参考答案：
从理论解释出发，寻求数据以检验理论的预测。
While（）money, she had worked very long hours.
A.raising
B.she was raising
C.raised
D.to raise
矿井年生产能力为90万吨的属（）。
A.大型矿井
B.中型矿井
C.小型矿井
