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:0.40
所属科目:小学英语
根据所听到的句子,选择合适的答句。
(     ) 1. A. I had a good time.     B. I did my homework.     C. I went to Hangzhou.
(     ) 2. A. It was great fun.   B. I visited the Star Park.   C. He visited the Star Park.
(     ) 3. A. It’s Friday.             B. It’s 6th November.             C. It’s sunny.
(     ) 4. A. She came to school at 7:10.        B. She comes to school on foot.       C. She came to school by bus.
(     ) 5. A. No, there aren’t.          B. Yes, there are.            C. No, there weren’t.
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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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