简易英语科技丛书 海洋生物PDF电子书下载

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Introduction 5

The seashore 6

Plants of the seashore 7

Animals of the seashore 8

Life on the surface of the sea—the plankton 13

Plant plankton 13

Animal plankton 14

Sea plants 15

Sea animals 16

Animals of the seabed 21

Animals of the deep sea 25

Mammals of the sea 26

The food chain 28

Dangerous sea animals 29

Survival in the sea 30

Man's future and the sea 32

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