学进去-教育应平等而普惠
试题
类型:提纲作文
难度系数:0.65
所属科目:小学英语
假如你是Jason,请给你的外国笔友Helen回复一封邮件,介绍你的情况。语句通顺,标点正确,至少
写8句话,参考下面的思维导图,请将作文写在对应横线上。
To: Helen
Subject: Re: Be my e-friend
Dear Helen,

Thank you for your email and your photo. I’d like to be your e-friend. ___________________


________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________

Yours,

Jason


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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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