学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,选择正确的答语。听两遍。
(      ) 1. A. Yes, he is.                                 B. Yes, I am.                           C. He is tall.
(      ) 2. A. He is ten years old.                B. He is 50 kilograms. C. He is 1.78 metres.
(      ) 3. A. She is 1.64 metres.       B. I am 1.67 metres.       C. He is 1.65 metres.
(      ) 4. A. My shoes are size 36.             B. His shoes are size 38. C. They are blue.
(      ) 5. A. Yes, Mike is.                           B. Tom is shorter. C. Mike is thinner.
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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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