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Old Smith is a very, very, very old man. He knows everything, he thinks. One day, a boy called Sam asked him where the Great Wall is. Old Smith told Sam it’s in China. Sam asked him how long the Great Wall is. Old Smith told Sam it’s 20, 000 kilometres long. Sam asked him how old the Great Wall is. Old Smith told Sam it’s millions (百万) of years old. But Sam told Old Smith it is only more than 2,000 years old.
1．Old Smith is a _________ man. ( )| A．young | B．old | C．clever |
| A．China | B．the Great Wall | C．everything |
| A．twenty thousand kilometres | B．twenty kilometres | C．two thousand years |
| A．knows | B．don’t know | C．doesn’t know |
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
