默写。① ,鬓微霜,又何妨? (《江城子·密州出猎》)②衣带渐宽终不悔, 。 (《蝶恋花》)③ ,浓睡不消残酒。 (《如梦令》)④学而不思则罔, 。 (《孔孟论学》)⑤必先苦其心志, ,饿其体肤… (《生于忧患 死于安乐》)
I'm sorry I'm late. The ____ is, the traffic is very busy at the moment.
函数处的切线方程是