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学进去-教育应平等而普惠
试题
类型:句图匹配
难度系数:0.65
所属科目:小学英语
读句子,选择合适的图片。
A. Good evening!
B. Wash your face, please.
C. She is a short and cute girl.
D. Put your books in your bag.
E. The room is not tidy.
F. This cat is so cute.
G. Let’s be friends.
H. I have a toy car.
I. Don’t touch your eyes.
J. The man is my teacher.
1.   (      )
2.   (      )
3. (      )
4. (      )
5. (      )
6.   (      )
7. (      )
8. (      )
9.   (      )
10.   (      )
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优质答疑

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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