学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.85
所属科目:小学英语
听录音,根据句子选择正确的答语。(听两遍)
(      ) 1. A. I miss them all.       B. I'll keep it forever.       C. I want to remember you all.
(      ) 2. A. The birds are singing.       B. It's sunny.       C. Yes, it is.
(      ) 3. A. Yes, I did.       B. Yes, I can.       C. No, I can't.
(      ) 4. A. Yes, I am.       B. I'm dancing.       C. No, I don't.
(      ) 5. A. They planned to make a paper spaceship.       B. They decided to make a paper spaceship.     C. No, they can't.
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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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