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. What did Lingling do?        B. What will you do tomorrow?          C. Where is it going?
(     ) 2. A. It's a Chinese dragon.     B. Draw a dragon on a piece of paper.       C. You can write the Chinese word on it.
(     ) 3. A. That's a great idea!                 B. Good idea.                                C. His name is Simon.
(     ) 4. A. Thank you for your help.       B. His mother and grandpa are Chinese.       C. He will visit his grandma.
(     ) 5. A. But will it be windy in New York?       B. Then I could fly my kite.     C. I'm going to visit my cousin in New York.
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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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