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Weather Changes
Sometimes the weather is happy. When it is happy, it tells the sun to play. Mary can go outside and play with her friends together. They can have a picnic and fly kites together. What a wonderful day!
Sometimes it is sad. When it is sad, it tells the clouds to rain. If it rains outside, Mary should stay at home and finish her homework.
Sometimes the weather is angry. It will call for lightning(闪电) and wind. Mary is afraid of these things.
1．When the weather is2．When the weather is angry, it will call for
3．What should Mary do if it rains outside?
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
