学进去-教育应平等而普惠
试题
类型:句子匹配
难度系数:0.65
所属科目:小学英语
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(      )1. It’s time for PE class.                                      A. Hand in the homework.
(      )2. It’s time to go to the garden.                            B. Draw a tree.
(      )3. It’s time for lunch.                                       C. Jump and run.
(      )4. It’s time to go to the library.                         D. Have some chicken.
(      )5. It’s time for English class.                               E. Drink some milk.
(      )6. It’s time to go to the teacher’s office.                F. Water the flowers.
(      )7. It’s time for breakfast.                                G. Read and write.
(      )8. It’s time to go to the art room.                         H. Read a book.
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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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