学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选择你所听到的句子。(听两遍)
( ) 1. A. Oh yes, I remember!        B. I had a lovely time there.          C. They're Li people.
( ) 2. A. This is Yinchuan.             B. Where is Yinchuan?               C. I went to Yinchuan.
( ) 3. A. I went there last year.   B. Last year she went to Qingdao.     C. Last year I went to Chengdu with my family.
( ) 4. A. They were cute.     B. It was very beautiful.     C. He's my uncle.
( ) 5. A. It's in the west of China.   B. It's in the north of China.     C. It's in the south of China.
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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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