【Daily Topic】【Storage & Transportation Edition 20170508】
Thread Content
Participation reward: 2 Wealth. Correct reward: 6 Wealth. Multiple-choice question: During storage and use, various polymer compounds are affected by external environmental factors, undergo abnormal degradation, and gradually lose their usability; this phenomenon is referred to as ( ). A、Ageing B、Rust C、Weathering D、Oxidation A
The phenomenon in which various polymer compounds, during storage and use, undergo abnormal degradation due to external environmental factors and gradually lose their usability is referred to as (A). A、Ageing B、Rusting C、Weathering D、Oxidation