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:0.65
所属科目:小学英语
听录音,选出你所听到的句子。
_____) 1. A. I have breakfast at six thirty.   B. I have dinner at six o'clock.   C. I have breakfast at six twenty.
_____) 2. A. It's 4:00. It's time for PE class.  B. It's 4:20. It's time for PE class.  C. It's 4:00. It's time for art class.
_____) 3. A. Go to the garden. Water the flowers.  B. Go to the art room. Draw a flower.  C. Go to the music room. Sing and dance.
_____) 4. A. Let's go home.  B. Let's go to the playground.  C. Let's go to school.
_____) 5. A. It's time to get up.  B. It's time to do my homework.  C. It's time for maths class.
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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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