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
听句子,选出最佳应答语。每小题读三遍。
(     ) 1. A. I’ll fly a kite.     B. At half past eight.       C. I went swimming.
(     ) 2. A. It’s in the south of China.   B. It’s in the west of China.       C. It’s Dalian.
(     ) 3. A. Yes, I will.            B. At the airport.        C. No, I didn’t.
(     ) 4. A. She borrowed some books.     B. She is a nurse.   C. She bought a bag.
(     ) 5. A. At 8:00.            B. To Beijing.               C. Clothes and my passport.
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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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