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:0.65
所属科目:小学英语
情景交际。(根据首字母提示写单词)
B: Ben   D: David
B: David, w_______ do you often do on Saturday?
D: I u_______ do my homework and sometimes help Mum with housework.
B: What a_______ Sunday?
D: I like s_______. So I often go swimming on Sunday.
B: Does your sister Nancy go w_______ you?
D: No, she d_______. She l_______ shopping. She often g_______ shopping with my mother.
B: You have a happy w_______, David.
D: That’s r_______.
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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

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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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