学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,根据所听内容,选择正确的选项。
(      ) 1. A. water                    B. computer                      C. sister
(      ) 2. A. hamburger             B. nurse                          C. bird
(      ) 3. A. cool                    B. cold                             C. cloudy
(      ) 4. A. rainy                    B. windy                          C. sunny
(      ) 5. A. way                    B. now                             C. world
(      ) 6. A. these                    B. those                      C. there
(      ) 7. A. hat                    B. hot                             C. hen
(      ) 8. A. green beans            B. garden                        C. goat
(      ) 9. A. hurry up               B. just a minute                 C. be careful
(      ) 10. A. go home            B. go to bed                     C. go to school
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优质答疑

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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