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When I was four，I played outside in the yard．I saw my grandpa's truck and thought，Grandpa shouldn't have to drive such an ugly truck．Then I found a gallon of paint（一加仑油漆）．I had a good idea! I got a brush and painted white polka dots（波点）all over the truck．（64）I was painting the truck in the garden when he walked outside．He was surprised to see the truck． "Angela，（65）it's the prettiest truck that I've ever seen!" he said．Sometimes I think adults don't stop to see things through a child's eyes．But my grandpa is different．He could have punished me．Instead，he didn't．
（64）1．（65）2．
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
