I see four pictures at school. Look at Pi - 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

I see four pictures at school. Look at Picture 1, it is a 1．. Some boys and girls run there. Look at the girls in Picture 2. They are standing at the door of the 2． room. What do students often do in this room? They often read news. Look at the third picture. It is a 3．. We often 4． books there. You can see many desks on the last picture. This is our 5．. Every day, we have classes here.

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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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