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学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.64
所属科目:小学英语
阅读判断(划线,标号)。
Today is Friday. My father, my sister, my kitten(小猫) and I are staying at home. My father is cleaning the sitting-room. My sister is cleaning her new bicycle in the garden. I am playing with my kitten in the balcony(阳台). We are happy.
1. Today is a busy day.
2. My father is cleaning in the bathroom.
3. My sister is cleaning the car in the garden.
4. I am playing in the garden, 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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