姜文和张国荣:five head of cattle 还是 five heads of cattle

five head of cattle 还是 five heads of cattle tow head of cattle 中的 head要加s吗 Mr Smith bought twenty more head of cattle.这里的head 是否加s ? 关于party of five a head of lettuce中的head是什么意思? 请问head of state和head of government的区别 乌龙元首head of state just head of all 是什么意思？ a number of five ciphers four out of five是什么意思 ?