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I II
（ ）1. What’s this?. A Bye-bye,Daming.
（ ）2. How old are you? B Thank you.
（ ）3. How many boys? C Goodmorning.
（ ）4. Where’s the cat ? D Nine.
（ ）5. Is it a monster? E It’s a desk.
（ ）6. Goodmorning, F I’m five.
（ ）7. Good afternoon. G Good afternoon.
（ ）8. Goodbye,Sam. H I’m fine ,thank you.
（ ）9. Happy birthday. I Yes, it is.
（ ）10.How are you? J It’s in the bag.
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
