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,选择正确的答语。听两遍。
(      ) 1. A. It was beautiful.                    B. I liked it.   C. I looked it up on the Internet.
(      ) 2. A. He had a good time.                                 
B. He was tall and thin before.
C. He tripped and fell.
(      ) 3. A. I like my school very much.
B. There was only one small building on a hill.
C. There is a new dining hall.
(      ) 4. A. That’s good exercise.                                 
B. I could ice-skate.
C. I went camping with my family.
(      ) 5. A. Before, he was quiet. Now, he is active.
B. He is funny and friendly.
C. His mother is a teacher.
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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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