学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
Listen and choose. 听问句,选答语。
(     ) 1. A. Yes, it is.                                 B. No, they aren’t.                    C. No, it isn’t.
(     ) 2. A. Yes, they are.                            B. No, his cap is blue.               C. No, they aren’t.
(     ) 3. A. I can show you.                         B. I go home by bike.               C. It’s under the desk.
(     ) 4. A. Twenty.                                   B. They are eight yuan.             C. It’s thirty yuan.
(     ) 5. A. I go to the restaurant by taxi.       B. I go to school by car.             C. It’s far from here.
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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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