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Amy's birthday is coming. On her birthday, she wants to have a birthday party in her house. She will invite her friends to her party. At the party, they will eat the birthday cake. Amy likes singing very much. So they will sing and dance. They will play many games, too.
Amy's parents will give her a big surprise（惊喜）. She will have a great time. Amy's birthday is on April 21st. The party will start at 7:30 p.m. You can send a birthday card to her email as a present（礼物）.
Here is Amy's email address: Amy112@yahoo.com.
1．Amy's birthday is in spring.2．The birthday party will start in the morning.
3．If you go to the party, you can eat the birthday cake.
4．Amy doesn't like singing.
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
