2)soapless detergent 的 two advantages?
3)soapy detergent 是否一定係biodegradable? no branched chains?
Thank you!
更新1:
4)If sea water were shaken with a sopless detergent which is biodegradable, what would be observed? foam or scrum or ....
4)If sea water were shaken with a sopless detergent which is biodegradable, what would be observed? foam or scrum or ....
收錄日期: 2021-04-26 11:36:35
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