什么将在上午的天气呢？分别取出上面的轻矿物和下面的重矿物，用酒精冲洗干净后烘干、称重，放入样品袋中备用。
Above, remove the light minerals and the heavy minerals, rinse with alcohol after drying, weighing, place the sample in the bag. If you find it you call her at.
什么将在上午的天气呢？分别取出上面的轻矿物和下面的重矿物，用酒精冲洗干净后烘干、称重，放入样品袋中备用。
Above, remove the light minerals and the heavy minerals, rinse with alcohol after drying, weighing, place the sample in the bag. If you find it you call her at.
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