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
听音选答语。听录音,给你所听到的句子选择恰当的答语。每小题读两遍。
(     ) 1. A. It’s on the second floor.              B. Yes, it is.
(     ) 2. A. It’s 11 o’clock.                     B. It’s time for lunch.
(     ) 3. A. Eighteen.                     B. They’re cows.
(     ) 4. A. You can fly a kite.                     B. It’s windy.
(     ) 5. A. They’re your father’s.               B. It’s your father’s.
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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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