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,选出正确的答语。每个小题读两遍。
(         ) 1. A. I have four books.                    B. I have a fat bear!             C. A storybook.
(         ) 2. A. It’s green.                                 B. It’s near the door.              C. OK!
(         ) 3. A. My name’s Wang Han.             B. She is a teacher.              C. Her name is Wang Han.
(         ) 4. A. I’m John.                                 B. She is Miss Wang.        C. Yes, you are right.
(         ) 5. A. It’s on the wall.                         B. Eight rulers.                     C. It’s black and white.
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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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