学进去-教育应平等而普惠
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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,选择正确的选项。
(      ) 1. The teachers’ office is on the ______.
A. first floor                    B. second floor                 C. third floor
(      ) 2. It’s 10: 00. Time for ______.
A. music class                    B. English class               C. PE class
(      ) 3. It’s ______ in Wenzhou today.
A. cold                                B. cool                              C. warm
(      ) 4. What time is it? It’s ______.
A. 7: 30                                B. 7: 35                              C. 7: 45
(      ) 5. Can I go outside now?
A. Yes, you can.                  B. No, you can.                 C. No, you can’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

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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