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,选出你所听到的内容。(听两遍)
(      ) 1. A. travelling       B. traveller             C. travel
(      ) 2. A. plan       B. planned             C. plans
(      ) 3. A. weren't       B. wasn't             C. won't
(      ) 4. A. the Bund       B. visited             C. sound
(      ) 5. A. stay       B. play                              C. away
(      ) 6. A. a lot of photos       B. some photos             C. a photo
(      ) 7. A. by ship       B. by plane             C. by train
(      ) 8. A. how old       B. how many             C. how long
(      ) 9. A. go to       B. go back to.             C. get back to
(      ) 10. A. go to Australia       B. go to the UK             C. go to the US
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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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