学进去-教育应平等而普惠
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难度系数:0.85
所属科目:小学英语
听录音,根据所听问题选择对应的答语。
( ) 1. A. I can play chess.     B. Yes, I can.        C. No, I'm not.
( ) 2. A. Yes, it can.             B. No, it can't.       C. Yes, it is.
( ) 3. A. It is seven yuan.       B. It's red.          C. It's beautiful.
( ) 4. A. Merry Christmas!     B. We eat dumplings.   C. Good luck!
( ) 5. A. I'm going to do the long jump.          
                       B. I am going to visit the zoo.
                       C. I'm watching TV.
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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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