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. today                       B. tomorrow                      C. Monday
(      ) 2. A. ill                            В. hot                                C. cold
(      ) 3. A. not so good               B. very good                      C. not bad
(      ) 4. A. after school               B. good afternoon               C. after dinner
(      ) 5. A. under the box             B. in the box                      C. in the basket
(      ) 6. A. have a headache          B. have a fever                  C. have a cough
(      ) 7. A. speaking to                 B. speak to                       C. say to
(      ) 8. A. take to                      B. take a cake                      C. take care
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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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