( ) Zhang Min is a cleaner. Twenty years ago, she swept streets with a broom. Now she drives a road sweeper. It can clean streets in a short time.
( ) Li Lin is a farmer. Twenty years ago, he harvested (收割) his crops by hand. Now he uses a machine.
( ) Liu Qin is a writer. Twenty years ago, she used a pen to write her books on paper. But now she works on a computer.
1.给每个语段选择正确的图片。
A. B. C. D.
1-4段
2.补全表格。
Time Name | Twenty years ago | Now |
Wang Jun | a camera with film | |
Zhang Min | a road sweeper | |
Li Lin | by hand | |
Liu Qin | a computer |
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