题目内容
牛能利用农作物秸秆及农作物加工副产品酒糟等生产肉、奶等畜产品
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奶牛品种单一化是世界奶牛业发展趋势
为什么要发展养牛生产？
在远古的时候，人们在海边捡到一种特殊而美丽的贝壳，把它当作货币使用。汉字“贝”，就是按照这种贝壳的形状创造出来的。后来，人们不再把贝壳当作货币。A special kind of shell was collected and used as money by our ____. The _______ ‘bei’ was used to _____ the shape of the shell. Later, shells were no longer used as money.
“宝贝”这个词用来形容那些珍贵的、自己喜爱的东西。再后来, 宝贝不光指物品。小孩子就是父母的宝贝。The word ‘baobei’ is now ___ the things we cherish.____, baobei was not only used to describe goods but also people. A child is his parents’ bao bei.
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