学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.85
所属科目:小学英语
根据所听的问句,选出正确的答句。(10分)
(    ) (1) A. It’s seven thirty.     B. It’s Sunday.    C. It’s nice.
(    ) (2) A. Yes, I do.      B. No, I’m not.           C. Yes, I am.
(    ) (3) A. Yes, we can.     B. Yes, we do.           C. Yes, we are.
(    ) (4) A. I brush my teeth.  B. I’m brushing my teeth.  C. I’m at home.
(    ) (5) A. That’s all right.     B. That’s right.      C. All right.
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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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