differential-interference microscope(微分干涉显微镜)
偏振光经合成后,使样品中厚度上的微小区别转化成明暗区别,增加了样品反差且具有立体感。适于研究活细胞中较大的细胞器
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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