Helen and I were friends six years a1．. She was te - 学进去中小学试卷试题库

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类型：填内容补全对话

难度系数：0.65

所属科目：小学英语

Helen and I were friends six years a1．. She was ten years old. She was short and thin. She had short black hair. She was a q2． girl. She didn't like the English class at all. Now Helen is in Class 3. Grade 6. She is t3． and thin. She has l4． black hair. She is very active in class. She is good at E5．. She often helps me with my English.

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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

用户名称

2019-09-19

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