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      • hyperphysics.phy-astr.gsu.edu
        Either form can be used with positive or negative lenses and predicts the ... there is a consistent convention to determine the sign of all distances in a calculation, ...
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    日期:2024-07-25
    Either form can be used with positive or negative lenses and predicts the ... there is a consistent convention to determine the sign of all distances in a calculation, ......