下列物质中,属于天然纤维的是 A.涤纶 B.羊毛 C.塑料 D.天然橡胶 发布时间:2017-04-26 12:36 │ 来源:www.tikuol.com 题型:选择题 问题: 下列物质中,属于天然纤维的是A.涤纶B.羊毛C.塑料D.天然橡胶
题型:选择题 The news came as no surprise to me. I ______ for some time that the factory was going to shut down.A.had knownB.knewC.have knownD.know 查看答案