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We live in the “computer age”．People like scientists，teachers，writers and even students use computers to do their work.
More than 30 years ago，computers could not do much.They were very big and expensive.Very few people were interested in them.Today computers are smaller and cheaper.As they are useful，many people like to use them.Computers become very important because they can work faster than men and make fewer mistakes.
根据短文判断正(T)误(F)。
( )（1）We live in the “computer age”．
( )（2）Computers were popular 30 years ago.
( )（3）Computers are smaller and cheaper now.
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
