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:0.65
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. autumn                      B. warm                            C. Sunny
(      ) 2. A. rubber                       B. bag                                C. jacket
(      ) 3. A. lessons                      B. pears                              C. seasons
(      ) 4. A. skirts                         B. spring                            C. summer
(      ) 5. A. my friends                  B. good friends                    C. my good friends
(      ) 6. A. have lunch                  B. have picnics                    C. have pineapples
(      ) 7. A. eat ice creams               B. eat some bananas             C. some ice creams
(      ) 8. A. go skating                    B. go boating                      C. go swimming
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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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