A
Good morning, Mr Green.
Good morning. Sit down, please
Now open your books.
Yes, Mr Green.
Don’t talk in class, Mike.
Stand up.
I’m sorry, Mr Green.
B
Hello, Mike. What is it?
It’s over there.
What are those?
How nice! Where’s your pencil case?
hello, Yang Ling. It’s a pencil.
They’re rubbers.
C
Happy birthday, Sam. How old are you?
It’s eleven o’clock. It’s time for the cake.
I see. This is for you.
What a lovely toy pig! Thank you.
Thank you. Is this a toy pig?
Yes, it is.
OK. Let’s go.
I’m two.
What time is it?
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同类型试题
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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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
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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