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
听句子或对话,选出你所听到的选项。
(______) 1. I go to bed at ______.
A. 9:45                       B. 9:30
(______) 2. —What's the time?
—______
A. It's ten past nine.           B. It's ten to nine.
(______) 3. —When do you get up?
—______
A. At twenty past six.           B. At twenty past seven.
(______) 4. —How many times can you jump in a minute?
—______
A. Twenty-nine times.           B. Twenty-five times
(______) 5. —______
—Thirty.
A. How many times can you bend your knees in a minute?
B. How many English words can you write in a minute?
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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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