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
听问句三次,选出正确答语,将其字母编号写在括号内。
(     ) 1. A. They grew some flowers.       B. They are playing basketball.       C. They played football.
(     ) 2. A. I like city life.       B. I’m from country.       C. Yes, I did.
(     ) 3. A. It’s half past twelve.       B. I am eleven.       C. There are fifteen.
(     ) 4. A. I have a fever.       B. I have a head.       C. I am feeding a dog.
(     ) 5. A. He rides his bike.       B. He’s reading a book.       C. He went to the cinema.
(     ) 6. A. It’s September 10th.       B. It’s in January.       C. Happy Teachers’ Day!
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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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