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,根据小对话,选择正确的答案。(听两遍)
(       ) 1. What has Lingling got?
A. A book.          B. A bird.          C. A bag.
(       ) 2. Are the books heavy?
A. Yes, they are.          B. No, they aren't.          C. We don't know.
(       ) 3. Which T-shirt does the girl like?
A. The black one.          B. The blue one.          C. The white one.
(       ) 4. Will the bag be easy for the girl to carry?
A. No, it won't.          B. Yes, it will.          C. We don't know.
(       ) 5. Did Lily buy a new bike yesterday?
A. Yes, she did.          B. No, she didn'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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