Sharpen your axe
Once upon a time, there were two woodcutters named Charles and John. Both of them were from the same town. They were often arguing with each other over who cut down more wood. So one beautiful morning, they decided to hold a woodcutting competition to determine the winner between them. The rules of competition were pretty simple—whoever produces the most wood in half a day wins.
They moved towards woodland nearby. Both of them took up their positions in the jungle and started cutting away trees in their fastest possible speed. Chop, chop, chop...The sound of axes hitting wood echoed(回响) throughout the forest. This lasted for an hour and all of a sudden Charles stopped. When John noticed that there was no chopping sound from Charles’s side, he thought: “Ah Ha! Charles must be tired already!” And he continued to chop down his trees with double motivation and pace.
A quarter of an hour passed, and John heard his opponent chopping again. After this both Charles and John carried on. John was starting to feel exhausted and the chopping from Charles stopped once again. Feeling motivated and sensing victory close by, John continued on, with a huge smile on his face. But after 15 minutes, John could hear the chopping sound again from Charles end. John brought his all energy together and kept cutting the trees to go ahead with the competition.
This went on the whole morning. Every hour, Charles would stop chopping the wood for fifteen minutes while John kept going persistently. So at 12 o’clock when the competition ended, John was totally confident that he would win the competition. He walked to Charles’s side and wanted to show off his great work.
注意:
1.续写词数应为150左右;
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But to John’s surprise, Charles had actually chopped down more wood.
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Charles smiled and replied, “It is very simple. I just stopped to sharpen the axe.”
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同类型试题

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2


y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

