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. three                       B. tree                      C. here
(      ) 2. A. Music                      B. match                  C. Maths
(      ) 3. A. Tuesday                  B. Thursday               C. birthday
(      ) 4. A. river                       B. lake                      C. boat
(      ) 5. A. subject                    B. Saturday               C. Science
(      ) 6. A. on the farm               B. go to the park        C. make a salad
(      ) 7. A. try again                  B. fly a kite               C. hungry and thirsty
(      ) 8. A. clean up                  B. queue up               C. get up
(      ) 9. A. so difficult               B. so easy                  C. so nice
(      ) 10. A. in the morning        B. in the evening        C. like singing
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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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