8____3=30____6  72____9=56____7  1____6=6____1

2014年6月7日，月工资只有1000多元的小区保洁员王爱芹，独自面对别人丢失的45万元巨款，她选择毫不犹豫地归还失主。她说：“我也丢过钱，失主丢了这么多钱不知有多着急呢！”王爱芹的行为（    ）

①是设身处地为他人着想的表现               ②表明在某种情况下需要“善意的谎言”

③是将心比心、急人所难的表现               ④是懂得换位思考、与人为善的表现

（Ⅰ）求f（x）的单调区间；

（Ⅱ）在锐角△ABC中，角A，B，C的对边分别为a，b，c，若f（ $\frac{A}{2}$ ）=0，a=1，求△ABC面积的最大值．

阅读理解

    He's always the first to arrive at school in the morning and the last to leave. He's always asked to answer the teachers' questions and he's always in first place in his class and in the whole school.

    Aron Anderson is in a class of his own — in fact, he's the only pupil in his school. The ten-year-old boy studies in this farthest primary school in Britain. Whether he likes it or not, Aron gets the most attention of his teachers all the time.

    During the school day, he has two classrooms, a music room and a library all to himselfAnd between classes and after school, he has the whole playground with its slides (滑梯), swings and basketball court.

    One problem, of course, is that although he loves football, he has no other friends to play with. He also becomes one of the most expensively educated children in the UK.

    Aron's father Ewan is a 43-year-old fisherman who sometimes spends days at the sea. His mother Denise works in the island shop. She is also a firefighter.

    The island used to have a senior high school and a farm, but they were both closed with many families leaving. “I just wish we could go back ten years. There were lots of children and the older children used to help the younger ones at school,” Aron's mother said.