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学进去-教育应平等而普惠
试题
类型:句型转换
难度系数:0.65
所属科目:小学英语
Rewrite the sentences(按要求改写下列句子):
1. There is a big fire in the forest. (根据划线部分提问)
______________________________
2. We must play with matches. (改成否定句)
______________________________ 
3. Fires can start in schools. (根据划线部分提问)
______________________________ 
4. Don’t play with matches. (换种表达,但意思不变)
______________________________
5. Helicopters can drop water on the fire.(用 now 改成现在进行时)
_______________________________ 
6. Please play with matches. (改成否定句)
_______________________________
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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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