学进去-教育应平等而普惠
试题
类型:填内容补全对话
难度系数:0.40
所属科目:小学英语
   阅读对话,填入适当的单词,每线—词
The little ducklings and Mother Duck live in a beautiful pond in Xixi Wetland Park(西溪湿地公园). One day, they see some ducks flying. Listen! What are Little(L. D. ) and Mother Duck(M. D. ) talking?
L. D. : Mummy, look at those ducks. They can f________ so high.
M. D. : Oh, baby. They are not ducks. They are wild g________.
L. D. : W________ are they from?
M. D. : They come from the n________.
L. D. : W________ do they come here? This is our home.
M. D. : It is winter now. So it is very c________ there. They cannot find enough food. So when winter comes, they must change their homes.
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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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