学进去-教育应平等而普惠
试题
类型:短文首字母填空
难度系数:0.65
所属科目:初中英语
根据短文意思和首字母提示,写出一个完整正确的单词。

Erhu is one of the most important Chinese instruments. It has a history of o1. 1,000 years. It is said that Erhu did not get its name u2. the late Qing Dynasty. It has been improved gradually since it appeared. It is also c3. the Chinese violin because its tone is as soft and bright as the violin’s. There are many w4. pieces of music played by Erhu, such as The Moon Reflected on the Er-quan Spring. You can go and e5. the charm of them. I hope you’ll love them.

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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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