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。根据你所听到的对话内容,分别从A、B、C 三个选项中给问题选出正确的答案。每段对话读两遍。
(      ) 1. A. Because he’s angry.        B. Because he’s hungry.        C. Because he’s happy.
(      ) 2. A. In September 2011.        B. In October 2010.              C. In July 2011.
(      ) 3. A. $17.25              B. $70.25              C. $17.52
(      ) 4. A. On the desk.        B. On the bed.              C. In the schoolbag.
(      ) 5. A. No, she didn’t.        B. No, she did.              C. Yes, she did.
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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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