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句子。
(     ) 1. A. schoolbag       B. school       C. classroom
(     ) 2. A. wall             B. floor          C. picture
(     ) 3. A. storybook     B. notebook     C. maths book
(     ) 4. A. short            B. strong          C. quiet
(     ) 5. A. candy          B. clean          C. toy
(     ) 6. A. Turn on the light.       B. Turn on the computer.
(     ) 7. A. My father is tall and strong.        B. My father is short but strong.
(     ) 8. A. Let’s clean the desk.                       B. Let’s clean the teacher’s desk.
(     ) 9. A. Put your eraser on the desk.                  B. Put your crayon in the desk.
(     )   10. A. Where’s the picture?             B. Where’s the kite?
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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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