一打鸡蛋 是a dozen of eggs还是a dozen eggs?

一打鸡蛋 是a dozen of eggs还是a dozen eggs? a dozen of eggs 就是一打鸡蛋,二十个,按单数还是复数处理呢? a dozen eggs 是复数还是单数 Do we need a dozen of eggs?改错 of的用法是什么啊?怎么用 为什么一大鸡蛋是：a dozen eggs 而一条面包却是 a loaf of bread? I bought a dozen eggs and ____ them was bad. The eggs are sold_______the dozen. 请问In this supermarket,eggs are sold ___ 是用by dozen还是by the d my mother paid 10 yuan for ( ) eggs A two dozen B two dozens a dozen 与 a dozen of 有什么区别 a dozen of 与dozens of 区别 dozen“一打”中的“打”的读音是?