学进去-教育应平等而普惠
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类型:听力题
难度系数:0.65
所属科目:小学英语
听录音,为你所听到的句子选择正确的答语。
_____) 1. A. Yes, I am.   B. Yes, we do.    C. Yes, we are.
_____) 2. A. Yes, it is.   B. Yes, he is.    C. This way, please.
_____) 3. A. It's so big.    B. It's our art room.    C. It's on the first floor.
_____) 4. A. Yes, she is.    B. No, it isn't.    C. Thank you.
_____) 5. A. Forty-five.    B. Yes, they are.    C. It's our classroom.
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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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