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An Old Man
One day an old man is taking a train to his hometown. One of his shoes falls onto the ground, but the train starts. He can not pick it up. Then he takes off the other and throws it near the fallen shoe. A boy beside his asks him ,“why do you do that?” He says, “If a man picks them up ,he may as well get a pair of shoes.”
1．An old man is taking a train to his hometown. （2．one of the man’s shoes falls onto the ground. （
3．The old man picks his shoes up. （
4．The old man takes off the other and throws it near the fallen shoe. （
5．The old man is very kind . （
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
