抛丸机除尘滤芯:运用现在分词描写下课时同学在干些什么。
来源:百度文库 编辑:神马品牌网 时间:2024/05/15 01:43:10
They are playing basketball.
He is cleaning the blackboard.
神马品牌网是一部内容开放、自由的互动网络百科全书
客观、专业、权威的知识性百科全书
来源:百度文库 编辑:神马品牌网 时间:2024/05/15 01:43:10
They are playing basketball.
He is cleaning the blackboard.