学进去-教育应平等而普惠
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类型:听音,选择听到的内容
难度系数:0.94
所属科目:小学英语
听录音,选择所听句子中包含的信息,每小题读两遍。
(      ) 1. A. go swimming                    B. go to see a doctor                    C. go to bed
(      ) 2. A. the first trip                    B. milk a cow                           C. going fishing
(      ) 3. A. in the trees                    B. in the park                                 C. in the garden
(      ) 4. A. played games                    B. fly a kite                                 C. see a film
(      ) 5. A. visited a farm                    B. do my homework                    C. make a cake
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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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