学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选出你所听到的单词或短语。(听两遍)
(      ) 1. A. river                      B. fever                         C. five
(      ) 2. A. cold                      B. cool                           C. cough
(      ) 3. A. ear                       B. dear                           C. hear
(      ) 4. A. speak                    B. speaking                    C. see
(      ) 5. A. today                    B. tomorrow                    C. window
(      ) 6. A. at school                 B. at home                      C. at night
(      ) 7. A. look at                  B. over there                    C. take care
(      ) 8. A. go to school            B. come to school            C. come home
(      ) 9. A. so cold                  B. so good                      C. so nice
(      ) 10. A. say to                  B. talk to                       C. speak to
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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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