- 問題詳情:Scientistshavedevelopedanon-stickchewinggum.Thenewgumcan_1_____(remove)easilyfrompavements,shoesandclothes.It’stheresultofpolymer(聚合體)researchattheUniversityofBristolandcouldbelaunchedcommerciallyin2008.___2___itcatcheson(流行),theproduct...
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