【单选题】I work harder at my lessons this year _____ I have made good progress.
【判断题】利用夹点编辑中的缩放命令将五边形放大一倍,并保留源对象,如图所示;在命令执行过程中激活夹点时,可以任意选择五边形的顶点。
【单选题】支气管扩张大咯血患者最危险且最常见的并发症是
【单选题】I came here three and a half months ago. I think I have made a good progress in English.