A. Bunny sees Papa. “Let's celebrate (庆祝) the first day of summer.” says Bunny. “Maybe on Sunday, but not today.” says Papa. “I have to (必须) clean the room today. I can use some help.” So Bunny helps.
B. That evening, Mama says, “Little Bunny, I'm sorry you can't celebrate the first day of summer.” “But look,” says Bunny, “We're in a clean room, we can see flowers, and we're drinking juice. We're celebrating the first day of summer now!”
C. “Mama,” says Bunny, “I want to celebrate the first day of summer. Can we go to the beach?” “That’s fun, but I have to plant flowers,” says Mama. “I can use some help.” So Bunny helps.
D. Later, Bunny asked Granny, “Do you want to go boating in the river?” “That's nice,” says Granny. “But I'm making juice. I can use some help.” So Bunny helps.
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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