【单选题】We have sent you samples by airmail ______your instruction.
【判断题】沙眼目前仍是我国致盲和低视力的最主要原因
【单选题】在WINDOWS98默认环境中,下列哪个组合键能将选定的文档放入剪贴板中
【单选题】在Windows的默认环境中,下列哪个组合键能将选定的文档放入剪贴板中( )
【单选题】We have sent you samples by airmail ____ your instruction.
【简答题】To acquaint you with the cotton piece goods we export now, We have sent you 3 copies of sample books by airmail.