张大力和王涛从环形公路上的A点同时出发，沿相反方向跑，第一次相遇在B点．张大力第二次到达B点后立即掉头沿相反方向跑．已知

解题思路：可以不考虑张大力、王涛两人从A点出发到第一次在B点相遇这一圈．
这样，问题转化为：张、王两人同时从B点出发，沿相反方向跑，张到达B点后掉头追王．张从B到B跑完一圈，在张跑完这一圈的时间内，王跑了[4/5]圈．这就是说，当张第二次到达B并掉头时，王在他前面[4/5]圈，把一圈路程看作“1”，那么张的速度是[1/4]，王的速度是[1/5]．张掉头后追王所需的时间为[4/5]÷（[1/4]-[1/5]），计算即可解答．

[4/5]÷（[1/4]-[1/5]），
=[4/5]÷[1/20]，
=16（分钟）；
答：张大力掉头后16分钟追上王涛．

点评：
本题考点： 追及问题．

考点点评： 此题属于复杂的追及应用题，此类题的解答方法是根据“追及（拉开）路程÷（速度差）=追及（拉开）时间”，代入数值，计算即可．

大力,
对不起哦,我很抱歉,没有去你的生日宴会,其实我也很想去,毕竟一年只有一次,可是,我也没想到啊,我朋友没有通知我就来了,我想推也推不掉哦.想跟朋友一起去你的生日宴会,也没好意思去,对不起,也没跟你说.希望你能原谅我哦.

字数应该够了吧,希望对你有帮助!

Dear Zhang,
I am really sorry to tell you that I was unable to attend your birthday party yesterday evening. That is owing to the fact that my old friends visited my house without telling me the exact time. I had to entertain those friends with my passion in the entire evening,and I will continue to entertain them in the following two days.

I really regret that I haven't go to celebrate your birthday personally and had missed a wonderful chance to enjoy myself with our kind colleages. I have prepared a pretty gift to you yesterday and will send to you this afternoon to show my best birthday wishes. Besides, I trust that you will understand me.

Best wishes,







yours sincerely,







Tom

1．C
2．B
3．虽短小精悍，却一波三折。（意思对即可）
4．原来人家早知道惟有他能举起这家伙。而这行字也是人家佩服自己，夸赞自己——张大力当然明白。（意思对即可）

字数应该够了吧,
Dear Zhang,
I am really sorry to tell you that I was unable to attend your birthday party yesterday evening.That is owing to the fact that my old friends visited my house without telling me the exact time.I had to entertain those friends with my passion in the entire evening,and I will continue to entertain them in the following two days.
I really regret that I haven't go to celebrate your birthday personally and had missed a wonderful chance to enjoy myself with our kind colleages.I have prepared a pretty gift to you yesterday and will send to you this afternoon to show my best birthday wishes.Besides,I trust that you will understand me.
Best wishes,
yours sincerely,
Tom

《认牙读后感》
医生的认牙的本领高超让人钦佩,在抓坏蛋中医生指认牙就分出来那个人更一步说明了认牙技术和高超.
还有医生看病付了钱才给看,最后还揭发了事情让人感到医生不仅医术 高超,还很有善心.

Hi,Dali,
Sorry that I was not able to go to your birthday yesterday,as one of the friends came to see me at the same time..
Yours
Best,
***

解题思路：可以不考虑张大力、王涛两人从A点出发到第一次在B点相遇这一圈．
这样，问题转化为：张、王两人同时从B点出发，沿相反方向跑，张到达B点后掉头追王．张从B到B跑完一圈，在张跑完这一圈的时间内，王跑了[4/5]圈．这就是说，当张第二次到达B并掉头时，王在他前面[4/5]圈，把一圈路程看作“1”，那么张的速度是[1/4]，王的速度是[1/5]．张掉头后追王所需的时间为[4/5]÷（[1/4]-[1/5]），计算即可解答．

[4/5]÷（[1/4]-[1/5]），
=[4/5]÷[1/20]，
=16（分钟）；
答：张大力掉头后16分钟追上王涛．

点评：
本题考点： 追及问题．

考点点评： 此题属于复杂的追及应用题，此类题的解答方法是根据“追及（拉开）路程÷（速度差）=追及（拉开）时间”，代入数值，计算即可．