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It was a cold winter day. A farmer found a snake on the ground. It was almost dead. The farmer was a kind man. He picked up the snake carefully and put it inside the coat. Soon the snake began to move. It opened its mouth and bit the farmer. “Oh, you bad snake!” said the farmer, “I saved your life, but you treat me in this way. You must die.” Then he killed the snake with a knife. At last, he died, too.
1．It was a cold autumn day.2．The snake was very kind.
3．The farmer put the snake on the coat.
4．The farmer killed the snake with a knife at last.
5．At last, both the snake and the farmer died.
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
