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One day Gary went to see a wise old man. He wanted to know why he was 1． to reach all of his goals in his life.
He found the old man 2． in a small house by the river. With a smile, the wise man listened and told him, “Please go and help me boil a kettel(壶)of water now.” Gary saw a big kettle and went out to get some wood. But because the kettle was too large, the water did not boil when the wood burned up. So he ran off to get more.
When he returned, the water had turned cold 3．. This time he learned his lesson and prepared enough wood ahead. Then the water boiled very quickly.
“If there is not enough wood, how will you boil the water?’’ the wise man asked. Gary thought for a while but didn’t know the answer, so he 4． his head.
“Well, then just pour out some water from the kettle!” the old man said. Gary nodded in 5．.
“At 6．, you had so many dreams and set too many goals,’’ said the old man. “It’s just like the large kettle full of water but you didn’t have enough wood. What will happen if you pour out some water?”
At this moment, Gary understood the wise 7． idea totally.
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
