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:0.85
所属科目:小学英语
听录音,根据句子选择正确的答语。(听两遍)
( ) 1. A. Yes, I do.       B. No, I didn't.       C. Yes, I can.
( ) 2. A. I bought some seeds.       B. It's the national flag of China.       C. I will buy some seeds.
( ) 3. A. She is putting the ball in the basket.       B. She put the hen in the basket.     C. It took us to the earth.
( ) 4. A. Simon bought her a model spaceship.       B. She gave him a model spaceship. C. Simon gave him a model spaceship.
( ) 5. A. We brought some presents.       B. We bought some presents.       C. We bring some presents.
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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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