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,选出合适的答语。
(     ) 1. A. I buy some bananas.             B. We bought some apples.             C. We buy some bananas.
(     ) 2. A. I went by plane.                    B. We go there by train.                    C. We visited Beijing last week.
(     ) 3. A. He is happy.                           B. He lost his bag.                           C. He took some photos.
(     ) 4. A. There are forty pupils.             B. There are fourteen crayons.       C. There are four people.
(     ) 5. A. No, she can’t.                    B. Yes, I can.                                 C. Yes, he can.
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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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