( )是教学大纲的具体化。A.讲义 B.提纲 C.教学参考书 D.教科书 发布时间:2017-06-01 15:50 │ 来源:www.tikuol.com 题型:单项选择题 问题: ( )是教学大纲的具体化。A.讲义B.提纲C.教学参考书D.教科书
题型:单项选择题 Loulan, once a small, wealthy commercial city, is believed by many people___________over gradually by sandstorms from AD 200 to AD 500.A.coveredB.was coveredC.to be coveredD.to have been covered 查看答案