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
听录音,选择正确的回答。(10分)
(      )(1) A. They are American.          B. They are from American.
C. They are in New York.
(      )(2) A. Yes, we do.         B. Yes, I am.     C. Yes, he does.
(      )(3) A. No, I speak Chinese.     B. Yes, I like Chinese.       C. I’m from China.
(      )(4) A Yes, he’s from the USA.      B. Yes, he’s my friend.      C. He is Mike.
(      )(5) A. Yes, she does.          B. Yes, she is living in China.
C. She can speak Chinese.
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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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