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
听句子,选择正确的答语。
(     ) 1. A. Yes, I am.                           B. Yes, he is.                                 C. No, she isn’t.
(     ) 2. A. Yes, you can.                    B. Sorry, she can’t.                           C. Yes, he can.
(     ) 3. A. I like sweets.                    B. They ride a bike.                           C. I’m going to run.
(     ) 4. A. Happy New Year!             B. Merry Christmas!                    C. Thank you !
(     ) 5. A. We give presents.                    B. He has a big family dinner.       C. She eats peanuts.
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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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