The theme and level of the text of The Whale , the main content of The Whale .

There is a complete explanation of the primary school textbook.

This article is a common-sense expository essay, introducing the physical characteristics, evolutionary process, species and living habits of whales, which not only shows a picture of whales, but also opens the door to a scientific exploration of the animal world.

Main content: Whales are larger and heavier than elephants. Whales are actually mammals.

Whales are mainly divided into baleen whales and toothed whales, and their diets are also different. Whales come to the surface every once in a while to breathe, their nostrils grow on the top of their heads, and they sleep in groups of several whales. Whales are born large and grow quickly, with a lifespan of more than 100 years.

In this article, the whale is introduced in vivid and interesting language, which is an extra-large and extra-heavy animal; Then, the evolution of whales is introduced in the order from ancient times to the present, showing that whales are fermented milk animals; Then he introduced the species of whales in concise language; Finally, the living habits of whales were introduced from four aspects: feeding, breathing, sleeping and growth.

This lesson is an expository essay. The text revolves around.

Through this question, everyone also has a lot of understanding of whales!