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,选择你所听到的句子。每小题读两遍。
( ) 1. A. Can you jump high?                            B. Can you jump far?
( ) 2. A. Let’s play a guessing game.                    B. Let’s play hide-and-seek.
( ) 3. A. This is our home. It’s No. 9.                    B. That’s my grandparents’ home. It’s No.10.
( ) 4. A. Fifty-six and forty-four is one hundred.                    B. Forty-six and fifty-four is one hundred.
( ) 5. A. She wears black trousers and shoes.       B. He wears a white and grey sweater.
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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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