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The Great Barrier Reef
Coral(珊瑚) is a living thing. A coral reef grows under the sea. Coral looks like plants but it is made up of animals. The biggest coral reef in the world is the Great Barrier Reef in Australia. The Great Barrier Reef is still growing now.
The Greenland(格陵兰岛)
An island is a piece of land which has water all around it. Some islands are in the sea. Some islands are in lakes or rivers. Islands can be big or small. Greenland is the largest island in the world. It's very cold in Greenland. It snows every month of the year.
1．Coral looks like plants and it is made by plants.2．The Great Barrier Reef isn't growing now.
3．An island is a piece of land which has water around it.
4．All islands are big and in the sea.
5．Greenland is the largest island in the world and it is very cold.
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
