搜尋標籤: "safeguarding the quality of drinking water"

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Drinking Water Treatment duration 19 minutes 33 seconds Drinking Water Treatment Drinking Water Treatment	Drinking Water Treatment This programme is divisible into 4 parts as follows: 1. Two Stages of Drinking Water Treatment a. First stage dosing – Chemicals are added to raw water in the treatment works before leading it… chlorine ozone safeguarding the quality of drinking water ronson@hkecl.net 0 個讚 803 次播放學科科學教育 Science Education 學習階段第三學習階段 (中一) Key Stage 3 (S1) 第三學習階段 (中一至中三) Key Stage 3 (S1 - S3) 作者教育局課程資源組版權聲明所有版權由香港特別行政區政府擁有上載日期 31/8/2006

duration 19 minutes 33 seconds

Drinking Water Treatment

This programme is divisible into 4 parts as follows: 1. Two Stages of Drinking Water Treatment a. First stage dosing – Chemicals are added to raw water in the treatment works before leading it…

chlorine

ozone

safeguarding the quality of drinking water

ronson@hkecl.net 0 個讚 803 次播放

學科

科學教育 Science Education

學習階段

第三學習階段 (中一) Key Stage 3 (S1)

第三學習階段 (中一至中三) Key Stage 3 (S1 - S3)

作者

教育局課程資源組

所有版權由香港特別行政區政府擁有

上載日期

31/8/2006