学进去-教育应平等而普惠
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难度系数:0.85
所属科目:小学英语
听录音,选择相应的答语,将其序号填入题前括号里。
(      ) 1. A. Yes, I do.                                        B. Yes, I did.                                 C. Yes, I am.
(      ) 2. A. I had some noodles.                           B. No, I didn’t.                           C. I bought some rice.
(      ) 3. A. Two bottles.                                 B. Three.                                        C. Half a kilo.
(      ) 4. A. OK!                                               B. Thanks.                                 C. It’s on the list.
(      ) 5. A. I live in London.                           B. I went to the UK.                    C. I had a good time.
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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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