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,读两遍。(10分)
(    ) (1) A. Yes there is.              B. Yes, it is.          C. No, it isn’t.
(    ) (2) A. I have five.               B. There are five.      C. I can see five.
(    ) (3) A.It’s my skirt.             B. She’s Yang Ling.    C. It’s Liu Yun.
(    ) (4) A. Yes, there is.             B.Yes, there are.       C. Yes, they are.
(    ) (5) A. It’s on the first floor.   B. They’re on the sofa. C. It’s new.
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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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