学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.65
所属科目:小学英语
读短文,选择正确的单词填空。

I 1. ______ (have/ has) a new friend. 2. _______ (His/ Her) name is Maria. She is a beautiful 3. _______ (boy/ girl). She 4. ________ (has/ have) a new schoolbag. It’s big. There 5. _______ (have/ are) many books in it. There 6. _______ (is/ are) a pen and three pencils in her pencil box. They are very nice.

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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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