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Do you know redwood trees? They can grow very tall, about 85 metres. They are taller than most buildings. They can live a very long time. Some redwood trees are 2000 years old. They have cones 
(松塔). The cone is the fruit, just as an apple is the fruit of an apple tree. Redwood trees grow by the sea. The weather there is just right for them. It is not too cold or too hot. They can grow very well.
1．Redwood trees can grow very tall.
2．Some redwood trees are 200 years old.
3．The cone is the fruit of a redwood tree.
4．Redwood trees grow in the mountains.
5．Redwood trees grow well because of the weather.
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
