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
听录音,根据对话内容,选择正确的答案。(听两遍)
(     ) 1. Where is the boy?
A. In the library.                      B. In a shop.                         C. At home.
(     ) 2. Where are the books about China?
A. They are on Shelf A.            B. They are on Shelf B.          C. They are on Shelf C.
(     ) 3. Is there a CD about China?
A. Yes, there is.                      B. No, there isn't.                  C. We don't know.
(     ) 4. Has the boy got a library card?
A. Yes, he has.                       B. No, he hasn't                    C. We don't know.
(     ) 5. Will the boy return (归还) the book to the library in two weeks?
A. Yes, he will.                         B. No, he won't.                 C. We don't know.
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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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