为了方便福建旅客到北京参观“奥运会”，铁道部拟增开一列福州--北京的直达快车．已知福州--北京两地相距2334km，一列普通列车与一列直达快车都由福州开往北京，若直达快车的平均速度是普通列车平均速度的1.5倍．直达快车比普通列车发车时间晚2h，却比普通列车早3.5h到达北京，求两车的平均速度？（精确到个位）．

句型拓展。

1. Su san is visiting her grandmother this weekend. (就画线部分提问)

    _____ _____Su san_____this weekend?

2. Can you show me your new bike? (同义句)

    Can you show_____ _____ _____ _____ _____?

3. I hope you will have a good time. (同义句)

    I  hope you will_____ _____.

4. The weather here is very cold. (对画线部分提问)

     _____the weather_____today?

5. It takes me two hours to play the piano everyday. (同义句)

    I _____two hours_____the piano everyday.