A：Ann always takes a dictionary with her.
B：Ann owns many dictionaries.
C：Ann knows many words.
（Ⅰ）求m的最大值；
（Ⅱ）已知a＞0，b＞0，c＞0，且a+b+c=m，求4a2+9b2+c2的最小值及此时a，b，c的值．
写笔顺。
①阔：
②芒：
