What is Soap?
63.1 هزار بار بازدید -
12 سال پیش
-
Why does soap work to
Why does soap work to get the grease and dirt off of dirty pans and other things when water alone can't do the job?
License: Creative Commons BY-NC-SA
More information at http://k12videos.mit.edu/terms-condit...
License: Creative Commons BY-NC-SA
More information at http://k12videos.mit.edu/terms-condit...
12 سال پیش
در تاریخ 1391/11/19 منتشر شده
است.
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