学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
听录音,选出你所听到的句子,并将相应的选项填写在题前的括号内。每小题听两遍。
______)1. A. I have a book.                   B. I have a ruler.
______)2. A. Show me your pencil box.           B. Open your pencil box.
______)3. A. Shake your legs.                   B. Shake your body.
______)4. A. Let’s go to school.               B. Let’s make a puppet.
______)5. A. Drink some water.               B. Have some juice.
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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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