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Lucy is an Australian girl. Today is her birthday. Now she is having a birthday party. Her parents and some of her friends are at her party. Now everything is OK. All the foods are on the table. The fruit is on the plates, and the candles are on the big birthday cake. Lucy is wearing a birthday hat and a dress. Her friends give her lots of presents. On the table in the living room there are many toys, birthday cards, some books and some CDs. She is happy to have the new CDs, because she likes listening to music. She can sing very well.
1．Lucy comes from A2．Lucy is having a birthday p
3．Lucy gets l
4．Lucy is good at s
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
