北师大版英语九年级unit8discoverieslesson23discoveryoftheyear课件内容摘要：
Charles Kettering, who said, “Believe and act as if it were impossible to fail,” these hardworking researchers tried experiment after experiment until they made a discovery that will change all of our lives for the better. While we honor you this evening, we mustn’t fet everyone who has worked so hard this year. All of you have done great work and we had a very difficult time making a final choice this year. So, in closing, I wish you a wonderful evening as we celebrate these great achievements. Now let’s give a warm。阅读剩余 0%
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