简述岩浆岩成矿专属性。
1.与镁铁质、超镁铁质侵入岩有关的矿床(超镁铁质岩体、超镁铁质—镁铁质杂岩体、镁铁质岩体) 2.与正长石、霞石正长岩和碳酸岩杂岩体有关的矿床。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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