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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:0.65
所属科目:小学英语
Xinxin: It's raining. But I can't find my umbrella. 1.
Mum: Sorry, I can't. 2.
Xinxin: Can you help me, Dad?
Dad: 3. I am washing my car.
Xinxin: 4.
Grandma: I can help you. Look, it's under the desk.
Xinxin: 5.
Grandma: You're welcome.
A.Sorry, I can't.
B.Thank you.
C.Can you help me, Mum?
D.Who can help me?
E.I am cleaning the room.
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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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