https://www.oupchina.com.hk/en/home (牛津大學出版社)
http://energy-efficiency.qed.hkedcity.net/ (香港教育城)
http://minisite.proj.hkedcity.net/edbosp-sci/cht/learning_and_teaching_resources/resources_list.html?id=4ef2aa376a0b6234770d0700 (香港教育城)
http://www.energyland.emsd.gov.hk/tc/energy/principle/index.html (機電工程署)
http://www.worldvision.org.hk/learn/educational-services-resources/669 (宣明會)
http://www.natureintouch.gov.hk/learning/activity/school_teaching_resource/0/630 (漁農自然護理署)
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