搜索
A long time ago, there was an old man who was very patient（有耐心的）. Every day, he sat in front of his house doing the same job. He was patiently sharpening（磨尖）a piece of iron（铁）. One day, his neighbour saw him at work. He asked the old man, “What are you doing?” The old man said, “I want to make this iron into a needle（针）. ”
The neighbour was surprised because the piece of iron was big but a needle was very small. He asked the old man, “How long will it take you to finish making the needle?”
The old man answered, “I don't know. If I die before I finish it, I will leave this work for my son. And if my son dies before it is finished, he will leave this work for my grandchildren. Someday, this piece of iron will be a needle.”
1．The old man was patient. （2．The old man worked every day. （
3．The old man worked at office. （
4．The old man wanted to make the iron into a needle. （
5．The old man didn't have any neighbours. （
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
