学进去-教育应平等而普惠
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类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选择正确的单词或短语完成句子,将其序号填入题前括号里。
______ 1. We eat lots of _______ (A. food; B. fruit).
______ 2. You can have some _______ (A. fish; B. sweets).
______ 3. I’m _______ (A. playing with; B. talking to my friend).
______ 4. There are horses. They’re _______ (A. running; B. jumping).
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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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