学进去-教育应平等而普惠
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难度系数:0.65
所属科目:小学英语
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(     ) 1. A. Su Hai lost her watch.              B. I have the matter.              C. I'm tall and strong.
(     ) 2. A. Sure, she can.                    B. No, she couldn't.                    C. Yes, she did.
(     ) 3.A. Really? I don't think so.       B. That's great.                    C. Sorry to hear that.
(     ) 4.A. Yes, it's a new bag.             B. Oh, it is yellow.                    C. How beautiful!
(     ) 5. A. Tom likes sweets.                    B. Jim is fat now.                    C. He got up late.
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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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