游石景山游乐园作文,100字左右,急需!

1
每张 50x(1+1/5)÷（1+1/2）=60÷3/2=40元
降价 50-40元
2
设降价x元
（1+1/2）（50-x）=50*(1+1/5)
3/2(50-x)=60
50-x=60x2/3
50-x=40
x=50-40
x=10
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设每张门票降价x元,则降价后门票价格为50-x元
则降价前后的收入比为：
50:[2*(50-x)]=1:(1+1/5)
2*(50-x)=50*6/5
50-x=30
x=20元

设门票为50元一张时,游客人数为m人
则,降价x元后,游客人数增加了m/2人,由题可列方程
(50-x)(m+m/2)=50×m×(1+1/5)
即,(50-x)×(3/2)=60
即,50-x=40
解得,x=10
所以,每张门票降价了10元

解题思路：根据题干，一共有4个班，三个地点，考虑最差情况：每个景点只有一个班级去，则还剩下1个班，无论分配到哪个景点，都会出现一个景点处有2个班级．

根据题干分析可得：4÷3=1…1
1+1=2（个）
答：一定有两个班要去同一个地点．

点评：
本题考点： 抽屉原理．

考点点评： 此题考查了抽屉原理的实际应用，要注意考虑最差情况．

Beijing Shijingshan Amusement Park which is located in Beijing Xishan Mountain Beauty Spot is 33 hectares and only 15km far from Tian'anmen. The line 1 subway and many public traffic lines could reach here directly. In this beautiful park, there are Gothic Cinderella Castle, Arabic restaurant, Euro style Blue Bridge, Russian gate tower, etc, all of which are filled with exotic fume. Those fantastic games, such as jet tower, gorge drift, big dipper and rocket bungee, are also quite attractive.
When you step into the park gate, you will see the jet tower and big dipper first which are unique in Beijing. After enjoying them, let's go the gorge drift the artificial scene. Jump out of the skin raft, you could join the speed race, relay race, etc. by different kinds of mini vehicles. If that is not enough, come to the 4D cinema, to feel the stimulation. The Blue Bridge links the east and west of the park. Cross the bridge, funicular railway will take you to see the sight of Beijing. Children's heaven also in this part, wild mouse, UFO vehicle, rocket bungee…in the center, in the Cinderella Castle, Cinderella is waiting her prince to come…delicious food in Maikenji, Kangkang, Fangyuan, Fangcheng are waiting for you. Welcome to Beijing Shijingshan Amusement Park!