学进去-教育应平等而普惠
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类型:填内容补全对话
难度系数:0.40
所属科目:小学英语
根据文章意思和首字母提示填写单词。

Long long ago, people a1. raw(生的) food because there was no fire(火) to c2. the food. Then, some people thought and f3. the stones could make fire, and the food was delicious. Now, people can eat d4. nice food from different places, like n5. in Xi’an, rice and fish in Hunan, seafood in Sanya, hot pot in Chengdu and so on.

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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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