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What is the biggest animal in the world? Do you know? The biggest animal in the world lives in the sea. It is the blue whale (鲸). It can be more than 30 metres long. A blue whale can weigh over 150 tons (吨). It is heavier than 30 elephants. The blue whale doesn’t eat big fish. It feeds on (以……为食) tiny creatures (微小生物). People killed the blue whales for their meat and oil in the past. But now no one is allowed to kill the blue whale.
1．The biggest animal in the world is the elephant.2．The blue whale lives in the sea.
3．The blue whale can be more than 30 metres long.
4．The blue whale eats big fish.
5．In the past people killed the blue whales for their meat and oil.
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
