已知幂函数f（x）=k•x^a的图象过点（3， $\sqrt{3}$ ），则k+a=____．

2009年5月，世界卫生组织召开成员国会议研究防控甲型HIN1流感的对策。中国政府表示，在做好国内疫情防控的同时，将加强与世界卫生组织、有关国家和地区的交流与合作，并提供必要的防控物资、经费和技术支持。这表明                 
①解决国际问题必须通过国际组织          
②国际组织是国际合作的纽带
③中国在国际事务中发挥主导作用          
④中国在国际事务中发挥建设性作用

由____围成的图形叫做三角形．

看图，根据字母提示，重新组合单词。

f h s i

____

阅读理解B
    Last Friday night l went to a great party．It was a birthday party for my teacher Mrs Brown．Students in my class all went to celebrate Mrs Brown's 40th birthday．We began to arrange(筹备)the party two weeks ago，but Mrs Brown knew nothing about it．
    We all met at a restaurant at 6：45 pm．There were 30 people．Mrs Brown's son took her to the restaurant and they arrived at seven o'clock．Just before seven，we all stayed in one room of the restaurant and made the room dark．
    When they got to the restaurant．Mrs Brown's son asked her to go into the room first．Then we all shouted．"Surprise!”
    Mrs Brown was really surprised．She jumped when she heard us．Then we sang Happy Birthday To You and she knew what was happening，We all had a great dinner and then a delicious birthday cake．
    For her birth-day,Mrs．Brown got a beautiful quilt(被子).We printed our photos on it．So it was a very special quilt．
    Mrs Brown enjoyed her evening，and we enjoyed it too．
根据材料内容选择最佳答案。