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①Sperm whales（抹香鲸）live in every ocean on the planet. Their large heads help them stand out from other whales. Here are some fun facts about them.
②Sperm whales have the biggest brains（大睡）of all the animals on earth. Our brains weigh about 1.4 kilograms, but a sperm whale’s brain can weigh up to 9 kilograms.
③Sperm whales are amazing divers（潜水者）. These huge animals can dive to around 2,000 meters and can go over 60 minutes between breaths.
④Sperm whales are the loudest animals alive. They make special high sounds to send information to one another from hundreds of kilometers away. The sounds are even louder than those made by planes. What’s more, each whale makes its own sound. Scientists believe this is how they recognize（认出）one another.
⑤Sperm whales sleep up straight near the surface（表面） of the water. It looks like they’re standing in the ocean. And scientists have found that they sleep for less than two hours every day.
⑥Ambergris（龙涎香）is a thing that forms in the stomach of a sperm whale. It is thought to protect the whale’s stomach. Sperm whales release（释放）ambergris into the sea as a sweet-smelling, egg-shaped ball. Ambergris is often used in fine perfumes（香水）. A kilogram of it can sell for up to $50,000. ___▲___
⑦Sperm whales have appeared in a novel. In 1820, a ship called Essex was hit by an angry 26-meter-long sperm whale. American writer Herman Melville later wrote about this event in his novel Moby-Dick.
⑧Sperm whales are really great animals. Learning about them may not be worth as much as a piece of ambergris, but it is certainly worth your while!
1．The writer develops paragraphs 2 and 3 by _________.| A．telling stories | B．listing numbers |
| C．showing steps | D．giving examples |
| A．It produces something that is worth as much as gold! |
| B．Ambergris is most often white, grey, black or brown in color. |
| C．This makes ambergris one of the most valuable things on earth! |
| D．Millions of sperm whales were found in the oceans in North America. |
| A．often hit ships in the sea |
| B．have a good smell like a perfume |
| C．sleep in the deep part of the ocean |
| D．can make sounds that travel very far |
(①=Paragraph 1, ②=Paragraph 2,…）
A． | B． | C． | D． |
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
