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Today is Sunday. It's 9 o'clock in the morning. The sun is shining. Jack, Amy and Sam are going to have a picnic in the park. They are buying things in the supermarket now. Jack is buying the food. He wants three hot dogs. Amy is buying the drinks. She wants some orange juice. And Sam is buying the fruit. He wants some apples and bananas. After buying all the things, they are going to ride their bikes to the park. They will have a good time in the park.
1．It's snowy today.2．Jack, Amy and Sam are going to have a picnic.
3．Jack is buying the food in the supermarket now.
4．Amy wants some apples and bananas.
5．Jack, Amy and Sam are going to the park by bike.
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
