学进去-教育应平等而普惠
试题
类型:填空题
难度系数:0.65
所属科目:小学英语
选择适当的词语填空
1. What_____ (was/ is/were) her mother before? She was a nurse.
2. His father_____ (drive/drives/drove) a train before.
3. What _____ (do/does/did) she teach? She teaches English.
4. What____ (is/be/was) he now? He’s a driver.
5. He_____ (played/plays/play) the flute before.
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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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