学进去-教育应平等而普惠
试题
类型:中英文匹配
难度系数:0.85
所属科目:小学英语
请为句中划线单词选择正确的汉语意思。
A.担心       B.借入,借来     C.记得       D.紧张的       E.纸

1.I remember. (      )
2.I'll make a paper fish for her. (      )
3.Don't worry! I'll help you. (      )
4.We borrow a bike for you. (      )
5.I feel very nervous. (      )
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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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