学进去-教育应平等而普惠
试题
类型:材料作文
难度系数:0.15
所属科目:初中英语
发展中的中国,使我们的生活变得越来越好.请根据下面提示,以 "Changes around us" 为题用英语写一篇短文.

要求:
1.不得使用真实的姓名和学校名;
2.短文需要包括所有要点,并适当发挥.
3.词数不少于 100 词 (文章开头已给出,不计入总词数).

Changes around us

Great changes have taken place in our life around us                                           


                                                                                            
                                                                                         
                                                                                       
                                                                                   
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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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