Scientistshavedevelopedanon-stickchewinggum.Thenewgumca...
問題詳情：Scientistshavedevelopedanon-stickchewinggum.Thenewgumcan_1_____(remove)easilyfrompavements,shoesandclothes.It’stheresultofpolymer(聚合體)researchattheUniversityofBristolandcouldbelaunchedcomm...