学进去-教育应平等而普惠
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类型:现代文阅读
难度系数:0.64
所属科目:小学语文
读课文,想一想。
◆作者在文章中回忆了故乡给自己留下的“美好的印象”。这些人和景物的特点是:
小溪:                                                             
茶山:                                                             
老家:                                                             
居民:                                                             
◆作者的故乡景色宜人,你最喜欢哪一处景致?把文有关的句子抄下来。
                                                             
                                                             
                                                             
                                                             
                                                             
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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

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

用户名称
2019-09-19
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