已知等比数列{a_n}满足2a₁+a₃=3a₂，且a₃+2是a₂，a₄的等差中项．

（Ⅰ）求数列{a_n}的通项公式；

（Ⅱ）若b_n=a_n+log₂$\frac{1}{a_n}$，S_n=b₁+b₂+…b_n，求使 S_n﹣2ⁿ⁺¹+47＜0 成立的正整数n的最小值．

阅读短文，根据短文内容及首字母提示，在空白处填入一个适当的单词，必要时进行词形变化．

    One afternoon，I went into an art museum while waiting for my husband．I hoped to enjoy the works of art quietly．

    A young couple walked in front of me and talked ____the paintings between themselves all the time．The lady did almost all the talking，but the man kept listening to her．I thought the man was very patient ____nobody would like to be bothered （打扰） while enjoying the paintings．

    I met them several ____as I moved through the different rooms of the art museum．Each time I heard her talking，I moved ____quickly．

    I was ____for some gifts at the museum shop when the couple walked slowly to the exit （出口）．Before they left，the man ____out a cane （拐杖）．Then he tapped （轻敲） his way to the coatroom to ____the jacket for his wife．

    "He is a brave man，"the worker of the shop said．"He decided not to change his life after his eyes got hurt．Though he is ____now，he never gives up．He and his wife come here whenever there is a new art show．"

    "But what can he get out of the art？He can't see!"I asked．

    "You are wrong．He ____a lot，more than you and I do．"The worker said，"His wife describes ____painting so he can see it in his mind．"

    I fell silent．Then I realized that I learnt something about patience，courage and love that day．

为切实推动节能减排，我国从2012年10月1日起禁止进口和销售100瓦及以上普通照明白炽灯，到2016年10月1日起，禁止进口和销售15瓦及以上普通照明白炽灯．一只“220V 12W”的节能灯的发光亮度相当于一只“220V 60W”的白炽灯，小明家的吊灯上现有5只60W白炽灯，换成同样亮度的节能灯需____只，原来的白炽灯正常工作10小时消耗的电能可供节能灯正常工作____小时．

楠楠与张晶是一对好朋友。楠楠与同学发生争执后，打算邀张晶一起去“教训教训”那个同学。张晶知道这样做不对，于是她可以对楠楠说（     ）

已知椭圆 $C：\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\left(a>b>0\right)$ 的右焦点为F，过椭圆C中心的弦PQ长为2，且∠PFQ=90°，△PQF的面积为1．

（Ⅰ）求椭圆C的方程；

（Ⅱ）设A₁、A₂分别为椭圆C的左、右顶点，S为直线 $x=2\sqrt{2}$ 上一动点，直线A₁S交椭圆C于点M，直线A₂S交椭圆于点N，设S₁、S₂分别为△A₁SA₂、△MSN的面积，求 $\frac{S_1}{S_2}$ 的最大值．