小明同学在课外用易拉罐做成如图所示的装置做小孔成像实验如果易拉罐底部有一个很小的三角形小孔则他在半透明纸上看到的像是a.蜡烛的正立像b Template




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tomski小明同学在课外用易拉罐做成如图所示的装置做小孔成像实验如果易拉罐底部有一个很小的三角形小孔则他在半透明纸上看到的像是a.蜡烛的正立像b coloring