学进去-教育应平等而普惠
试题
类型:填内容补全对话
难度系数:0.65
所属科目:小学英语
读下面小短文,从括号里选择正确的单词填在横线上。

I’m so happy today. So many gifts for my brother Alex and me! Let me see... What’s this? Oh, this is 1. (a / an) new dress for me. It’s nice. Look! These 2. (is / are) pants for Alex. 3. (It’s / They’re) so big. Wait! Are those new toy 4. (car / cars)? Let me see... No, they 5. (are / aren’t). They are Alex’s new shoes. They look like cars! So cool!

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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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