A driver his car by the road to have a rest.He closed his eyes and fell asleep.A man came up and knocked at his window to ask the time.The driver his eyes and looked his watch."It's 8 : 05 , "he said.
Then he closed his eyes again.Soon another man knocked at the window and asked, “ Sir, you have the time?" The driver looked at the watch and told man it was 8:2(5)
He could not have a good rest, so he wrote some words on a piece of paper and put on the window.It said, "I have no watch." Then he closed his eyes and fell asleep again. later, a third man along and saw the paper.
He began knocking at the ."Hi, sir," he said, silt's now."


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

