点击下载：《英语国家社会与文化入门》课程PPT教学课件（下册）The Society and Culture of Major English-Speaking Countries An Introduction Book 2 Unit 20 The Canadian Economy
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Three main industries: natural resources (primary industries) manufacturing (secondary industries) service (tertiary)industriesThree main industries: • natural resources (primary industries) • manufacturing (secondary industries) • service (tertiary) industries
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点击下载：《英语国家社会与文化入门》课程PPT教学课件（下册）The Society and Culture of Major English-Speaking Countries An Introduction Book 2 Unit 20 The Canadian Economy
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