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[[QOrDeR]]Tree Planting Day in China is on12th March. ________________________
【小题2】Planting trees is good for us.___________________________________
【小题3】My friends and I enjoy planting trees. ___________________________
【小题4】We should look after them. Soon they will become big trees. ____________________________
【小题5】The earth is getting hotter and hotter.___________________________________
【小题6】Trees help to make the air cool and fresh. ___________________________
【小题7】Let’s plant more trees to make the Earth clean and green.____________________________
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
