搜索
A sad young man went to see a doctor，”Doctor，I have problem.If I sleep on the bed，I'll think there is a man under the bed.But if l sleep under the bed I'll think there is a man on it What should l do?”“Don't worry，I can cure(治愈)you.It will cost about eight dollars.” said the doctor.”1 will think about it.”said the young man and then he left.
A week later，the doctor saw the young man again and he looked very happy.” What happened?” asked the doctor in surprise.”A farmer cured me.He told me to cut off the bed legs，and he charged me only five dollars.”
（1）Why did the young man leave when the doctor wanted to cure him?
（2）Did the farmer cure the young man'?
（3）Do you think the young man is clever(聪明)?
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
