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12月23日,记者获悉,受持续降温天气影响,黄河壶口段近日出现大面积流凌。流凌流经壶口瀑布后,在下游“十里龙槽”开始堆积,形成流凌封河景观。白色的流凌犹如一条巨龙横卧在晋陕峡谷间,与河岸的冰挂、壮美的瀑布相互映衬。SourcePh" style="display:none"
Innovations in recent years to make testing methods more sophisticated include thermal imaging, light analysis using lasers, and DNA profiling.