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What is the greatest invention in the world? Is it the telephone that lets us talk to people from all over the world? Is it the car that lets us travel at great speeds to meet others? Umberto Eco, an Italian writer, thinks it might be a pair of glasses.
Modern eye glasses were invented around 1000 years ago. In the past, people who could not see properly must memorize (记忆) everything. When we have eye glasses, we can see clearly and do whatever we want. Eye glasses are one of the world’s greatest inventions. Maybe people wear eye glasses to invent the first telephone and car.
1．The telephone is one of the greatest inventions because ________.（ ）| A．we can travel |
| B．we can talk to people from all over the world |
| C．we just need it to read |
| A．the telephone | B．the car | C．a simple pair of glasses |
| A．memorize everything | B．write down everything | C．read everything |
| A．modern eye glasses were invented 100 years ago |
| B．people who invented the first telephone and the first car probably wear the glasses |
| C．the writer is an’ American |
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
