i wanna have ( a class of / two classes of ) beer and coke 选

前者和后者的意思不同,得看你是想表达什么样的意思、
① I wanna have a glass of beer and coke.我想喝一杯啤酒和一杯可乐.
② I wanna have two glasses of beer and coke.我想喝两杯啤酒和两杯可乐.
X glasses of sth = 几杯的意思、
③ I wanna have two glasses of beer and a glass of coke.我想喝两杯啤酒和一杯可乐.
一般都是这样说的 ：）