光诱导的电子转移（photoinduced electron transfer，PET）是指激发态电子从电子供体到电子受体的转移现象，光致激发态是发生电子转移（ELT）的起因，故有光诱导电子转移之称。 这是一 …

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比如PET对应的是雅思4-4.5分左右，和BEC preliminary剑桥商务英语初级语言能力相当。 另外，剑桥通用英语五级考试（MSE）本身是严格按照欧洲委员会制定的语言教学大纲进行设计 …

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PET塑料材质具有以下性能特点： 1.力学性能：PET塑料材质具有良好的力学性能，包括冲击强度高、耐折性好、耐磨擦、磨耗小、硬度2.高等特点。