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
听句子,选择正确的答语,并将其序号写在题前的括号内。
(       )1. A. I can search for a lot of things.   
B. I read many books.                    
C. We should save water.
(       )2. A.I can clean their houses.             
B. I can plant more trees for our earth.
C. I can find out some countries.
(       )3. A. I enjoy eating mooncakes.          
B. I will bring some mooncakes.
C. I like the ones with red beans.
(       )4. A. We should plant more trees.       
B. We shouldn’t kill wild animals.       
C. There isn’t enough water on the earth.
(       )5. A. It’s a good idea!                      
B. Let’s meet at Star Theatre.
C. No, I can’t.
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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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