学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.64
所属科目:小学英语
读短文判断,与短文内容相符的用“√”表示,不符的用“×”表示
It's a sunny day. Alice and Kitty are playing in the park. They are friends.  But she can fly a kite. Kitty is tall and thin. She can skip a rope. They are happy.
1. How is the weather? It’s sunny. (     )
2. Alice is Kitty’s friend.  (     )
3. Alice is tall and thin.  (    )
4. Alice can fly.  (    )
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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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