学校大门口所设的滑动门是由平行四边形钢架组成的，这是利用其（　　）

1：Classmate to xishan outing tomorrow
2：Set time 6:45 PM tomorrow
3：Set place the school gate
4：Wear sports shoes, bring your own lunch, 5 p.m. back to school.
OK?

May 8, Saturday Fine

I went for an outing with my ciassmates all of day.And I had a good time.In the morning,we aggregated out of the school door.I went school at six and a half o'clock.
And then we took bus to the Xihu Park together at eight o'clock.We were excited on our way to the Xihu Park.We arrived at Xihu Park at nine o'clock.We enjoied ourself in the boat.And then we went to the picnic.It was very delicious and interesting.In the afternoon,we took many great photoes and visit the museum.We all had fun.At four o'clock we returned to the home from the Xihu Park.I was a little tired but happy,too.It was a great day!
There are four kinds of things on the platform,a bicycle key,a pair of sunglasses,a hair band,newspaper,whose are these things?We only know that in this class,Alice liks reading newspaper,Jack often rides a bike to school,Kathy hates sunshine,she likes to be cool,Lillian has long hair,Maris hates reading.So with these tips we can conclude that:the newspaper is Alice's,not Maris,the bike is Jacke's since only he ride a bike to school.The sunglasses is Kathy's cause the sunglasses can help her to prevent her eye from being basked by the sunshine,also wearing a pair of sunglasses will be cool in appearance.The hair band is Lillian's cause Lillian can use the hair band to prick her long hair.

This Saturday we will have a visit to a history museum.

Notice
Attention please!There will have a activity on 15 September morning.The day is Sunday,and we will meet at the school gate. We will go there by bus at 6.And climb the mountain ,then we will have a picnic on the mountain.Please don't be late! And you should wear running shoes and take water and lunch yourself.
自己写的、可能会有语法错误、

There will be a climbing and picnic on the top of mountain in September 15th, and we should gather at school gate before 6:00am when we take the car.Sneakers as well as water and food are supposed to be carried!（前面都把要点都写出来了你还可以斟酌加一两句类似“请注意”的话,我觉得9月15日就表明周日所以就没翻译周日）

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您好，很高兴为您解答
leave for the school gate and gather at half past eight pm.
敬请追问，您珍贵的采纳是我坚持的动力，祝您学习进步
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解题思路：此题主要用正负数来表示具有意义相反的两种量：把学校大门口的位置记作0，以向东为正，则向西走就记作负，每格表示150米，直接得出结论即可．

（1）如果小胖从学校门口向东行600米，那么小胖的位置记作+600米，正好到达 游乐场；
（2）如果小胖的位置是-150米，说明小胖从学校门口向 西行了 150米；
（3）300-200=100（米）
答：如果小胖从学校门口先向西行200米，又向东行300米，这时，小胖在学校的 东面（填“西面”或“东面），离学校 100米．
（4）150×3÷75=6（分钟）
答：如果小胖走路的速度是每分钟75米，他从学校门口走到超市，需要 6分钟．
故答案为：+600，游乐场，西，150，东面，100，6．

点评：
本题考点： 负数的意义及其应用．

考点点评： 此题主要考查正负数的意义，正数与负数表示意义相反的两种量，看清规定哪一个为正，则和它意义相反的就为负．