求证:AB=CD.
∴∠B=∠C,∠A=∠D,
∵在△AOB和△DOC中,
{∠B=∠C
My friends thought they had made things very smooth for me, but I felt there was still much to ________ with.
我们要弘扬“自强不息、艰苦奋斗”的昂扬锐气。以下事例符合这一传统美德的有( )
①张海迪高位截瘫;仍努力学习 ②部分学生日常消费互相攀比
③红军过草地,风餐露宿 ④一次考试失利,自暴自弃