学进去-教育应平等而普惠
试题
类型:其他
难度系数:0.65
所属科目:小学英语
A. bee        B. dog          C. elephant          D. snake        E. monkey

1.It is very big. It is a mammal. It has a long nose and two big ears. (      )
2.It is an insect. It’s a black and yellow. It likes flowers and it can make honey. (      )
3.It is a mammal. It has four legs. It can help keep your home safe. (      )
4.It is a mammal. It is very clever. It is good at climbing trees. (      )
5.It is a reptile. It has no legs. It can be long or short. (      )
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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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