如图所示为一物体作匀变速直线运动的速度图线，下列判断正确的是（　　）

A．物体的初速度为3m/s

B．物体的加速度大小为1.5m/s²

C．2s末物体位于出发点

D．前2秒的加速度与后两2秒的加速度方向相反

用括号内动词的适当形式填空或者根据首字母提示填空。（共5小题，每小题2分，满分10分）

Everyone has a hobby , so do I . My hobby is   小题1: (keep) a diary in English. When I was nine years old , I began to have my hobby . At first it was difficult for me , but now it is easy . I know it’s possible   小题2: (learn) English well with more practice. So I keep a diary in English . I think it is o 小题3:  of the best ways to learn English well.

After school I often go to the school library to read English books. Sometimes my English teacher asks me  小题4:(do) something interesting. So I get information for my diary by doing these.

After I finish my diary every day, I always   小题5: (try) correct mistakes(纠正错误) with the help of the dictionary. Now my English is very good.