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Isaac Newton was a famous scientist. He was born in England in 1642. When he was a child, he was very quiet. He was always thinking about things. One day he was reading a book under an apple tree. He saw an apple fall from the tree. He thought, “Why do apples fall? What makes them fall?” He was the first person to find out why.
1．Isaac Newton was a famous scientist. （2．He was born in England in 1942. （
3．When he was a child, he was very quiet. （
4．He was always thinking about things. （
5．He wasn’t the first person to find out why. （
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
