89 kinds.
This is a classic math problem. We can go 10 one step at a time and 1 or 2 at a time. We need to find out how many different ways to reach this level. We can think of this problem as a sequence, and the nth item of the sequence represents the number of methods to go to the nth step. Then, the nth term of the sequence is equal to the sum of the first two terms, that is, a(n) = a(n- 1)+a(n-2), where a (1) = 1 and a (2) = 2.
Now we need to calculate the 10 term of this sequence, that is, the number of methods to go to 10 step.
The calculation results show that there are 89 ways to reach step 10.
Step Tá iji: 1. The three stars are also called Taibu, so they are called Bubu. The ancients thought that there were statues of the Three Kingdoms, because it meant the status of the Three Kingdoms or the status of a vassal. Similar words: going up stairs, stone steps, working class, stairs, platforms, platforms.
The sentences related to these steps are as follows:
(1) The higher you climb, the harder it is to walk. There is almost no road behind you. We were panting with fatigue and our clothes were soaked with sweat, but we didn't give up. There are some big stones near the top of the mountain. Every time you climb a big rock, you must find something to catch, otherwise you can't get up. After many twists and turns, we finally reached the top of the mountain.
(2) When I walked to the stone arch bridge and walked up the stone steps, I noticed that all kinds of beautiful patterns were carved on the bridge: lotus flowers in bud, naughty and lovely little monkeys, dancing butterflies ... There were carp of various colors in the river, and a piece of bread was still sinking. They swim happily, wagging their tails and competing for food. How cute!
(3) Standing on the steps and looking forward, there is a tall cypress tree in the center of the playground, at least five or six meters high, with lush green leaves and a tall trunk that looks very energetic. Stand there no matter what difficulties you meet. Set a good example for us to learn.
(4) The Erythrina tree grows on the steps of the school gate, like a tall and strong sentry, guarding the beautiful campus day and night. There are many thorns on the trunk of Erythrina tree, which is used for self-defense like a hedgehog. Its leaves are wide and big, just like our palms.
At night, the spring breeze blows gently. I sat on the colorful steps with my chin cupped, and another unforgettable thing came to my mind.