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Tom: Hello, Tom!
John: It’s a postcard.
Tom: Where is he from?
John:
Tom:
John: He likes reading, swimming and playing football.
Tom: Wow! He has so many hobbies.
John: We often write to each other.
Tom: That’s great!
John: We talk about interesting things and places.
Tom: That’s cool!
| A．It’s from my pen friend, Mike. |
| B．What’s his hobby? |
| C．What do you often write to talk about? |
| D．He’s an Australian boy. |
| E．What’s in your hand? |
同类型试题
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
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
