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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
A: 1. These machine make crisps.
B: 2.
A: It washes the potatoes. Look! This machine cuts the potatoes. 3. They are dangerous.
B: 4.
A: This machine puts the crisps in the bags.
B: It’s fun.
A: You are a very good class. You can each have a bag of crisps.
B: 5.
A.Thank you, sir.
B.Welcome to our factory, children!
C.Sorry, sir.
D.Don’t touch the machines, please!
E.What does this machine do, sir?
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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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