学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.85
所属科目:小学英语

I am a Chinese boy. There is only one 1.in my family. My pen friend is Jack. He 2. a big family. He has got two brothers and two 3.. His father has got four brothers and his mother has got four sisters. Here is a 4. of his family. Look! There are a lot of 5. in his family.

A.photoB.has gotC.peopleD.childE.sisters
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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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