学进去-教育应平等而普惠
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类型:音标题
难度系数:0.65
所属科目:小学英语
读一读,从文中找出含有er且er读作/ə/的单词,写在下面横线上。

Hello, I'm Peter. There are five people in my family, my father, my mother, my brother, my sister and I. My father is a driver. My mother is a farmer. My brother is a teacher. I'm a student. I like winter. In winter, the water in the river is cold, but I can play with snow(玩雪). My brother likes winter, too.

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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

用户名称
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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