某同学在做《探究小车速度随时间变化的规律》实验时，得到了如图一条较为理想的纸带，从某点开始每五个点取一个计数点，依打点先后编为A、B、C、D如图所示，测出AB=1.2cm，AC=3.6cm，AD=7.2cm，则打B点时小车的瞬时速度大小为____ m/s，小车运动的加速度大小为____ m/s²．（打点计时器的电源频率是50Hz）

   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.

I like _________, but she likes _____________.

农谚云：“种麦到立冬，种一缸，打一瓮”“立了冬，楼在摇，种一葫芦打两瓢”。 这都是人们对农业活动的总结，对指导农业生产很有作用。这说明（  ）