Wendy: Hi! Danny! What are you doing?
Danny:
Wendy: Me too.
Danny: I am looking for a new story book. I want to buy it.
Wendy:
Danny: I think so.
Wendy: That’s cool. Have a try!
Danny: Yeah! Yeah!
A.What are you looking for? |
B.Find the website and the book, put it into the cart and pay. |
C.I am surfing the Internet. |
D.I can buy things on the Internet now. |
E.Can you buy books on the Internet? |
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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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