There are lots of f1． in the city. We can often se - 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：0.85

所属科目：小学英语

There are lots of f1． in the city. We can often see the black s2． out of the chimney(烟囱). It makes the a3． very d4．. Some people f5． ill. They need to see the d6．. People can’t jog in the streets in the early m7．. Or they will get a bad c8．. I think we should move the factories away from our city.

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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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