学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,根据所听内容选择正确答语,听两遍。
_____ 1. A. This is a doll. B. It’s blue.         C. It’s a doll.
_____ 2. A. No, Tm Joe.     B. No, I’m not.       C. No, thank you.
_____ 3. A. It’s a ball.       B. Yes, please.        C. How nice!
_____ 4. A. Yes, I am.       B. Yes, please.        C. Yes, it is.
_____ 5. A. Thank you.      B. See you.          C. Nice to meet you.
_____ 6. A. It’s green.        B. It’s an orange.      C. It’s great.
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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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