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小杨在练习调节教学投影仪的实践活动中1凸透镜的作用是成倒立放大实像填“正立放大实像 “正立放大虚像 “倒立放大实像 或“倒立放大虚像 Template






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sketch 5216 D by Gabriela Segura
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sketch 4601 PSY Gentleman by Luis Daniel Sanchez Ramirez
sketch 342 Forest scene
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