我市统计局发布的统计公报显示，2004年到2008年，我市GDP增长率分别为9.6%、10.2%、10.4%、10.6%、10.3%. 经济学家评论说，这5年的年度GDP增长率相当平稳，从统计学的角度看，“增长率相当平稳”说明这组数据的（）比较小.

    One night last February, seventeen-year-old Duffy drove home1 a winding road, he saw a 2light thrown against the tree. “I knew it wasn't the moon”, he said. “I drive this road 3and I notice little things 4”

    Duffy stopped his car and got out to 5Below him far down in the deep valley 6a broken car with its headlights on. Thirty minutes 7a man had driven off the edge of the road, which has no guardrail（护栏）. His car fell and8over, landing on its top more than two hundred feet 9

    Duffy 10to call for help, then returned and got down to reach the 11driver. Snow covered the valley and the temperature was below 12After struggling back up the cliff（悬岸）, Duffy 13his jacket and shirt and wrapped the injured man in time, along with the blankets from his 14.

   15deeds are starting to become16action for Duffy, the oldest of seven children. When he was 12, he17his ten-year-old brother from drowning（溺水）. Two years ago, his three-year-old sister 18rat poison（毒药）, and Duffy cleaned out her mouth, made her drink milk to protect her 19and called doctors.

    “We have tried to teach the children good 20and it looks like we have got some reward for it,” his father says.

如图，“赵爽弦图”是由四个全等的直角三角形和一个小正方形构成的大正方形，若直角三角形的两边长分别为3和5，则小正方形的面积为 ____