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We live in the “computer age”. People, like scientists (科学家), writers, teachers and even students use computers to do much work. Computers are very important (重要的) because they can work faster than us and make fewer mistake (出错少). Computers can help people do lots of work. Writers use computers to write. Teachers use them to teach and students use them to study. Computers can also remember (记住) what you put into (输入) them. Computers are very useful and helpful.
They are our good friends. Do you want to have a computer?
1．We live in the “_______ age”. ( )| A．reading | B．computer | C．book |
| A．little | B．less | C．lots of |
| A．slower | B．fast | C．faster |
| A．Men | B．Computers | C．Women |
| A．useful and helpful | B．bad | C．fast |
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
