学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
Listen and choose. 听问句,选答句。
_____) 1.A. His name is Wang Xin.         B. She is Amy.
_____) 2.A. He is in the bathroom.        B. Yes, he is.
_____) 3.A. I’d like some beef, please.  B. No, thanks.
_____) 4.A. Three pencils and two rulers.  B. Many books.
_____) 5.A. Purple and white.             B. Five.
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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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