A:m<﹣2
B:m<0
C:m>﹣2
D:m>0
“碧玉妆成一树高,万条垂下绿丝绦,不知细叶谁裁出,二月春风似剪刀.”万千枝条及其绿叶,都是由植物体哪一结构发育而来( )
The teacher's name is Henry Mason. His students call him ________.
下图所示内容是林申同学整理的笔记要点。由此判断他学习的内容是( )
已知:在△ABC中,∠BAC=90°,AB=AC,点D为直线BC上一动点(点D不与B、C重合).以AD为边作正方形ADEF,连接CF.