如图所示，两只纸船浮在水面上静止不动，用大注射器向两船之间的水面快速注水，两船将

   This is my beautiful home. There is a small garden in front of my house. There are many beautiful flowers in the garden. Behind my house there is a big tree. Near the tree, you can see a garage. My father’s beautiful car is in it now.
   On the first floor, there is a large living room, a dining room, a kitchen and a bathroom. I like watching TV in the living room. On the second floor, there is a small study room and two bedrooms. I love playing with the computer in my study. 
   What a nice home! I like it very much.

用棱长为2分米的小正方体，拼成一个较大的正方体，最少要____块，这个较大正方体的体积是____．

25，21，23，25，27，29，25，24，30，29，26，23，25，27，26，22，24，25，26，28．

对这些数据编制频率分布表，其中24.5-26.5这一组的频率为（　　）