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
根据所听内容选择合适的答句。 (听两遍)
(      ) 1. A. No, thank ou.        B. Yes, Mr Green.        C. It’s nice.
(      ) 2. A. Yes, please.        B. Yes, it is.        C. I’m sorry.
(      ) 3. A. No, it isn’t.        B. It’s in the tree.        C. It’s on the tree.
(      ) 4. A. It’s behind the door.        B. It’s a door.        C. Yes, it’s a door.
(      ) 5. A. No, it’s a schoolbag.        B. It’s a school bag.        C. It’s red.
(      ) 6. A. It’s in my bag.        B. She’s in the library.        C. He’s in the classroom.
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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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