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煤矿床是沉积矿床。()

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矿体晚于围岩且不属同一地质作用形成的矿床是后生矿床。()

高岭石化是一种典型的高温热液蚀变类型。()

矿石中的非金属矿物叫脉石矿物。()

How, according to the text, will unconditional tuition reimbursement reduce employee turnover？

A. By making employees more loyal.
By paying employees more money.
C. By promoting education.
D. By reducing stress and thus health problems.