选择恰当的单词。Was, fell, more, greener, countryChanges a

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类型：填内容补全对话

难度系数：0.65

所属科目：小学英语

选择恰当的单词。

Was, fell, more, greener, country

Changes are all around us. Look at the sky. Ten minutes ago, it 1． rainy, but now the rain stops and we can see a rainbow. Last winter, there were no flowers in the garden and every leaf 2． with the wind. But when spring comes, there are 3． and more flowers. The grass and the trees are getting 4．. Before, my grandparents lived in the 5．, but now they live in a tall building.

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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

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2019-09-19

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2019-09-19

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