某实验小组在探究凸透镜的性质和用途请你与他们合作共同完成以下问题1如何确定选出的透镜是凸透镜请写出一种方法. .2如果点燃蜡烛 Template




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tomski某实验小组在探究凸透镜的性质和用途请你与他们合作共同完成以下问题1如何确定选出的透镜是凸透镜请写出一种方法. .2如果点燃蜡烛 coloring