做直线运动的小车带动纸带通过打点计时器打出的部分计数点如图所示，每相邻两个计数点间有4个实际点未画出，打点计时器打点时间间隔为0.02s，

（1）图中5个间隔点的平均速度为______m/s．

（2）小车的加速度为______m/s²

补全对话。

A:Hi, Jack. How     l    your vacation?

B:It was pretty good.

A:Where did you _  2     ?

B:I went to Beijing     3    my parents.

A:     4     did you go there?

B:We     5  _ there by train.

A:     6    did you do?

B:We visited Tian'an Men Square. There     7  _ many people there.

A:How were the people?

B:    8     were very friendly.

A:How was the     9     ?

B:    10     was sunny and cool.