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:0.65
所属科目:小学英语
听录音,选择你所听句子中包含的那个单词或词汇。
(     ) 1. A. often                              B. always                            C. sometimes
(     ) 2. A. do morning exercises        B. do my homework               C. go for a walk
(     ) 3. A. June                                B. January                           C. July
(     ) 4. A. play in the snow                 B. make a snowman             C. go swimming
(     ) 5. A. autumn                            B. summer                           C. winter
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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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