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
对话理解。你将听到5组对话,请根据你所听到的对话内容,分别从A, B, C三个选项中选出正确的答案,并将它的字母标号填在题前括号内。每组对话读两遍。
(      ) 1. A. My brother.               B. My uncle.                  C. My aunt.
(      ) 2. A. Go swimming.            B. Row a boat.               C. Go to a pop concert.
(      ) 3. A. Yes, they are.             B. No, he isn’t.               C. Yes, he is.
(      ) 4. A. By train.                    B. By plane.                  C. By bus.
(      ) 5. A. No, it won’t               B. Yes, it will.               C. Yes, it won't.
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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

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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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