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,选出与你所听到的句子内容相对应的答语。读三遍。
(      ) 1. A. He is Mr Li.       B. He is tired.       C. He is a policeman.
(      ) 2. A. Yes, he did.       B. Yes, he is.       C. Yes, he does.
(      ) 3. A. On Shelf C.       B. It’s a Chinese book.       C. That’s a good idea.
(      ) 4. A. I think so.       B. At seven o’clock.       C. It’s blue.
(      ) 5. A. I went to Beijing.       B. It will be windy.       C. Thank you for your help.
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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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