如图所示，质量为m=5kg的物体与水平地面间的动摩撩因数μ=0.2，现用F=25N且与水平方向成θ=37°的力拉物体，使物体加速运动，求物体加速度的大小？（取g=10m/s²，sin37°=0.6，cos37°=0.8）

    Hello! I'm Victor.I have a bed, a desk, two chairs and a computer in my bedroom.My bed is small but very nice.It's blue because I like blue very much.My desk is big.It's white.You can see a computer and so many books on it.I do my homework here.I have two chairs.One is big and one is small.The big one is near the bed.The small one is near the window.I like my room.

某课外小组为了解本校2014-2015学年八年级700名学生每学期参加社会实践活动的时间，随机对该年级50名学生进行了调查，根据收集的数据绘制了如下的频数分布表和频数分布直方图（各组数据包括最小值，不包括最大值）．

You'd better ______ her number in the phone book.