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Amy and Tom are very good friends. Tom’s birthday is coming. Amy wants to give Tom a birthday present. She goes to the shop after school. She wants to buy a present for him, but she finds everything is expensive(昂贵的). Then she has a good idea. Tom likes kites. She can make a birthday kite. She will draw a beautiful picture on the kite and write the words“Happy Birthday!” on it. She hopes Tom will be happy when he gets it.
1．Amy and Tom are very good friends.2．Amy’s birthday is coming.
3．Amy wants to buy a present for Tom.
4．Amy likes kites.
5．Amy will make a card for Tom.
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
