Самостоятельная работа по теме "Линзы"

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object(ArrayObject)#852 (1) {
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object(ArrayObject)#874 (1) {
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    ["title"] => string(116) "Конспект урока по физике «Повторение темы «Световые явления»» "
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object(ArrayObject)#852 (1) {
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    ["title"] => string(23) "Линзы и глаз "
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