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( ) 1. Good afternoon. A Good morning!
( ) 2. What’s your name? B Hi, I’m Sarah.
( ) 3. Hello! C Fine, thank you.
( ) 4. Bye! D Great!
( ) 5. Let’s go to school! E Nice to meet you, too.
( ) 6. Good morning! F My name’s John.
( ) 7. How are you? G See you!
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( ) 9. Let’s paint. I Hi!
( )10. Hello！I’m Wu Yifan. J OK!
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
