是How many kilos of meat 还是How much kilos of meat

当然是How many kilos of meat,kilo是可数名词.

how much 吧

用How many kilos of meat。因问的不是肉，而肉的重量。

How many kilos of meat

kilo是可数名词,用How many

这个句子的中心词是kilos,是可数名词复数，应该用many修饰，即How many kilos of meat?much修饰不可数名词，例如：How much money does it cost?
这里的much修饰不可数名词money,money在这里可以省略。