The invention of the zero helped people (calculate more easily)对括号内部分进行提问

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• 用英语解释句子 The abacus is ancient invention还要用英语解释：3.The abacus is an ancient invention.4.The Indians invented the systen of numbers.5.Most of my answers are accurate.1.The invention of the zero helped people calculate more easily.对calculate more easily提问.2.People wrote numbers in many different ways.对in many different ways提问.3.You mustn't eat in the reading room.改为祈使句4.people,easier,for,work,machines,it,to,make.连词成句
• The invention of the zero helped people (calculate more easily)对括号内部分进行提问
• The invention of the zero helped people (calculate more easily)对括号内部分进行提问
• 用简单英语解释下列句子（同义句）.1.It’s hard to tell what the words stand for these days.用简单英语解释下列句子（同义句）2.The team consists of 10 girls and 5 boys.3.The abacus is an ancient invention.4.The Indians invented the system of numbers.5.Most of my answers are accurate.按要求完成下列各句1.Mr Hill owned three restaurants in Shenzhen.对划线部分提问（three） 2.The invention of the zero helped people calculate more easily.对划线部分提问（calculate more easily）3.People wrote numbers in many different wa
• what would people do before deat Will they cry?what will a dying peole do?will he crys?这2句有怎么不同 :-)
• Which invention helped people write big numbers and calculate more easily?选项有两个：A.the 1-9system B.the zero 答案是B我想选A,