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| green white eyes mum four big |
Fish: I am not your mum. Your mother has two big 1． and a 2． mouth.
Duck: I am not your mum, too. Your mother has a 3． belly（肚皮） and 4． clothes.
Tortoise: I am not you mum. Your mother has 5． legs.
Frog: Look, I have two big eyes, a big mouth, a white belly, four legs and a green clothes. I am your 6．. My dear babies. Come on!
Tadpoles: Mum! We have a mum! I love you.
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
