video pembelajaran zat aditif dan zat adiktif

link video  >      https://www.youtube.com/watch?v=foq_zU4D2vk

Part 1         >      https://www.youtube.com/watch?v=M7p6m0b_epQ

Part 2         >      https://www.youtube.com/watch?v=AstMtW2BK-w

zat adiktif   

>      https://www.youtube.com/watch?v=axPHdIDPX6g

>      https://www.youtube.com/watch?v=XMh-R1prjIE