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,选择合适的应答语。
(       ) 1. A. I like spring best.              B. I like it.              C. The Four Seasons.
(       ) 2. A. I go shopping.                    B. I have noodles.
C. Because my mum worked last night.
(       ) 3. A. My birthday is on May 1st.     B. His birthday is on May 2nd.
C. Her birthday is on May 3rd.
(       ) 4. A. It’s mine.       B. They are storybooks.   C. They are mine.
(       ) 5. A. It’s a monkey.                    B. It’s playing with its mother.
C. They are drinking water.
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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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