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
听问句,选择正确的答句。每小题读两遍。
(      ) 1. A. He likes reading.               B. He is reading.               C. He often reads books.
(      ) 2. A. Yes, she is.               B. Yes, he does.               C. Yes, she does.
(      ) 3. A. I’m going to the bookstore.        B. I’m going to read a book.        C. I’m going there tomorrow.
(      ) 4. A. He works in a school.        B. She works in a school.        C. She goes to work on foot.
(      ) 5. A. You should wear warm clothes.        B. You should count to ten.        C. Don’t be sad.
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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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