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Look! The children are having a birthday party for Linda. Sarah is singing and Tina is dancing with Mary. Li Ming is playing the piano, but the bell rings. So he stops and everyone waits. Linda opens the door. More friends come in. They buy a new schoolbag for Linda. Now they are singing "Happy Birthday!" to Linda together. They are very happy today.
[[QOrDeR]]The children are having breakfast. （【小题2】Sarah is dancing with Mary. （
【小题3】Li Ming is playing the violin, but the bell rings. （
【小题4】Linda gets a new schoolbag as a birthday present. （
【小题5】They are very happy today. （
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
