学进去-教育应平等而普惠
试题
类型:补全对话
难度系数:0.65
所属科目:小学英语
根据上下文,选择合适的句子补全对话。
John: Hi, Chen Jie. Look at my new crayons!
Chen Jie: 1.
John: Thank you.
Chen Jie: 2.
John: Guess!
Chen Jie: 3.
John: Open it and see.
Chen Jie: 1, 2, 3…13! 4.
John: That’s right.
Chen Jie: Goodbye.
John: 5.
A.You have 13 crayons.
B.Bye.
C.Oh, how nice!
D.How many crayons do you have?
E.Twelve?
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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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