如图，在平面直角坐标系中，O为原点，直线AB分别与x轴、y轴交于B和A，与反比例函数的图象交于C、D，CE⊥x轴于点E，tan∠ABO=$\frac{1}{2}$，OB=4，OE=2．

中学生小琛喜欢炫耀，今天说姑姑从美国给他带回一架照相机，明天说妈妈给他从日本带回一件漂亮的外衣，一时间他成为班里的风云人物，于是变得洋洋得意。小琛的言行是 

      There are  1 days  2 a week. They are  3 , Tuesday, Wednesday, Thursday, Friday, Saturday and4  .Sunday is the first day 5 a week. Monday is the second day of a week. The last day of a week is Saturday.  6  China, people work 7days a week. They go to work from Monday 8  Friday. They don't go to work 9 Saturdays and Sundays . They stay 10  home.