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【Daily Topic】【Storage & Transportation Edition 20170512】

2017-05-12View Original

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Participation reward: 2 Wealth. Correct reward: 6 Wealth. Multiple-choice question: Over time, the plastic casings of certain instruments and equipment experience a decrease in their tensile, bending, compressive, and impact resistance, which leads to changes in the product’s ( ). A. Appearance B. Physical properties C. Mechanical properties D. Electrical properties C

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