学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.64
所属科目:小学英语
看图,选择下面的句子,把对话补充完整,将序号填在( )内。

(   )(1)A. I'm four.            B. Four.             C. I'm fine, thank you.
(   )(2)A. She's my mother.     B. He's my father.   C. He's my brother.
(   )(3)A. Nice to meet you.    B. Good morning.     C. Good afternoon.
(   )(4)A. He's my father.      B. She's my sister.  C. He's my brother.
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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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