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学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.94
所属科目:小学英语
判断对(√)错(×)。
_____)1. Peter is siting beside Sally.
_____)2. He is collecting shells.
_____)3. —Is she playing volleyball? 
—Yes, she is.
_____)4. My parents are enjoying the sunshine on the beach. My brother and I are collecting the shells.

_____)5. have的现在分词是having。
_____)6. He is reading book.
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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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