Arbor Day
In America, people celebrate(庆祝) Arbor Day in April. This annual(每年的)holiday encourage(鼓励)people to plant and care for trees.
I received a tree seedling(幼苗)on Arbor Day when I was 7 years old. My parents helped me plant the little tree in our front yard(院子). I was so proud of it! 25 years later, I an still proud when I see it! Now it is a tall tree.
America isn’t the only country to have a tree planting day. Korea and other countries, also have hold a national(国家的)tree planting festival.
1.American Arbor Day is in April.2.I planted a little tree 7 years ago.
3.There is a tall tree in our front yard now.
4.Korea is the only country to have a tree planting day.
5.America isn’t the only country to have a tree planting day.
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同类型试题
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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
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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
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