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In China,children ask their parents for pocket money (零花钱）.However,in Western countries,most children make pocket money for themselves.1. They help parents do housework to make money. They can also get some part-time jobs.The best time for part-time jobs is during the summer holiday. They can send newspapers or work in a fast food restaurant. Doing these things can teach children a lot. 2. They learn that making money isn’t easy,so they will not waste money. They will buy things they need or want, such as books, pencils, movies and even clothes they like. So parents should encourage their children to make pocket money.
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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
