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,根据所听对话,选出正确的答案。(听两遍)
(      ) 1. What do they want to do?
A. They want to go to the party.          B. They want to go shopping.        C. They want to go to school.
(      ) 2. How is the sweater?
A. It's too small.                              B. It's too big.                            C. It's too old.
(      ) 3. What colour does Sam like?
A. Green.                                      B. Yellow.                                 C. Black.
(      ) 4. Where are the shoes?
A. They're under the desk.                 B. They're under the sofa.            C. They're under the bed.
(      ) 5. Is Yang Ling cold?
A. No, she isn't.                              B. Yes, she is.                            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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