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Summer holiday is coming. Sally is going to visit her grandpa next month. Sally’s grandpa lives on Hainan Island with her uncle. Sally loves to visit them because the weather there is nice. She can go fishing by the river and collect beautiful shells (贝壳) with her cousins on the beach. Sally will go boating with her uncle, and then they can count stars at night together. They also plan to visit the farmers’ market and buy some fruit, because they think the fruit on Hainan lsland is fresh and very delicious. Sally will enjoy her holiday on the island.
Summer holiday is coming soon. I _____________________________________________________
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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
