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I’m Kitty. Today is my birthday. I’m thirteen years old. My parents are going to have a birthday party for me. Mom is cooking. Where is my sister, Lily? She is helping Mom in the kitchen now. Dad is going to buy some flowers. My brother, Kevin can take photos well. So he is going to take photos for us. We are happy today.
1．Today is Kitty’s birthday.2．Lily is in the study now.
3．Kitty’s dad is going to cook.
4．Kevin can take photos well.
5．Kitty’s family are happy today.
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
