学进去-教育应平等而普惠
试题
类型:阅读单选
难度系数:0.65
所属科目:初中英语
   Anvitha Vgay, 9, can build an app. With the help of You Tube videos, the young techies from Melbourne, Australia, learned to code (编程) at age 7. Soon, she was trying her hand at making apps. “When I first got my iPad, I was fascinated by all the apps on it,” she said, “It wasn’t long before I wanted to create my own.” She built her first two apps with her younger sister in mind. Smartkins Animals helps children identify (识别) more than 100 animals and their sounds. Smartkins Rainbow Colors teaches kids colors. Each app has been downloaded thousands of times.
1.When did Anvitha begin to learn to make apps?
A.At the age of 7.B.At the age of 8.C.At the age of 9.
2.For whom did Anvitha build her first two apps?
A.For her brother.B.For her sister.C.For herself.
3.What is Smartkins Animals?
A.A toy.B.An app.C.An apple.
4.What does Smartkins Rainbow Colors teach kids?
A.Colors.B.Animals.C.Animals’ sounds.
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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

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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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