学进去-教育应平等而普惠
试题
类型:阅读选择
难度系数:0.65
所属科目:小学英语
读一读,选一选。

It’s Sunday today. The weather is good. It’s sunny and warm. Tingting isatthe park with her family. They are having a picnic. Her father is flying a kite. Her mother is eating sandwiches (三明治). Her grandma is sleeping. Tingting is drawing a picture. They are having fun.

1.The weather is ________. (   )
A.windyB.rainyC.sunny
2.Tingting’s family are ________. (   )
A.at schoolB.at homeC.at a park
3.Tingting’s grandma is ________. (   )
A.eatingB.sleepingC.drinking
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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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