19.Indica qué unidades son de masa, de tiempo, de longitud, de superficie y de volumen: Kg, cm, m 3, Hm2 hora, mg, ml, Km, cm2 , s, cg, dm3 , Tn, m2 , Hm3 , mm, litro, cm 3 , min, m, dam.​

What's a good idea to do beforehand, if you plan on drinking with your friends? a. assign a designated driver. b. bring extra keys in case you lose yours. c. bring extra cups and shot glasses. d. figure out who holds their alcohol well and make them the driver.