学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听句子,选择正确答语。
( ) 1. A. How do you do?          B. I’m fine, thank you.   C. I’m five.
( ) 2. A. She’s thirteen.             B. She’s a teacher.     C. Her name is Jane.
( ) 3. A. Yes, it is.       B. Yes, they are.     C. Yes, he is.
( ) 4. A. No, she isn’t.     B. No, she doesn’t.     C. No, she has a sister.
( ) 5. A. They’re students.     B. They’re in Class One.        C. They come from England
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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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