顶端单峰式这种模式的特点是
剖面上,烃、汞等气体组分于矿体头部上方均显示为单峰异常,平面上则为块状、条带状、串珠状异常,异常分布区常与断裂构造的地表出露点(带)相对应。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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