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、短语或句子。
(     ) 1. A. big                       B. bed                                   C. but
(     ) 2. A. cold                      B. coat                                   C. cool
(     ) 3. A. toy                       B. tall                                     C. today
(     ) 4. A. walk                      B. warm                                 C. watch
(     ) 5. A. music                    B. milk                                   C. maths
(     ) 6. A. park                      B. party                                   C. photo
(     ) 7. A. go shopping            B. go swimming                       C. go skating
(     ) 8. A. put on                    B. look at                                C. come back
(     ) 9. A. I like football.          B. I like basketball.                  C. I like table tennis.
(     ) 10. A. He’s got a bag.        B. He’s got a kite.                    C. He’s got a bike.
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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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