如图，以△ABC的边BC为直径的⊙O分别交AB、AC于点D、E，连结OD、OE，若∠A＝65°，则∠DOE＝____°．

根据句意及汉语提示填空。
____ We can't ____ ____ ____（习惯）the weather here because the wind is always strong.
____ I'll help you, ____ ____（即使）I don't sleep for a night.
____ I would like more time to _____ this problem _____ (仔细考虑).
____ You can ____ us ____ (打电话给……) when you get to Shanghai. We will meet you.
____ At the age of 5, my father ______ _____ _____ (对……感到满意) my good results at school.

一个分数的分母缩小5倍，分子不变，分数的值（   ）。

（Ⅰ）求函数f（x）= $\frac{\left|3x+2|-|1-2x\right|}{\left|x+3\right|}$ 的最大值M．

（Ⅱ）若实数a，b，c满足a²+b²≤c≤M，证明：2（a+b+c）+1≥0，并说明取等条件．