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
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(     ) 1. A. Mike is.                            B. We are.                                  C. Helen does.
(     ) 2. A. Yes, please.                            B. Yes, I like.                                  C. No, I don’t.
(     ) 3. A. Monkey King.                     B. The Little Match Girl.              C. Nezha.
(     ) 4. A. I have a cold.                     B. He has a cold.                            C. She has a cold.
(     ) 5. A. He’s a worker.                     B. From MON to FRI.                     C. On foot.
(     ) 6. A. Take some medicine.              B. Have a rest.                            C. Both A and B.
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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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