题目

完形填空Robots seem very new to most people. And they have a long history. The   1  one was made by a Greek inventor (发明家). You may   2   robots in some films. The robots in these   3   are stronger, faster and cleverer than people. In real life, most robots are used in factories. They are used to do many dangerous, difficult or boring   4  . Some people can’t look after   5   and robots are used to help them. For example, some people can’t see, many of these people use a   6   to help them move around. This dog is called a guide dog.  7   are making a ro填写比和除法、分数的联系和区别。联系区别比比的前项：比号比值一种关系除法÷ 除号除数商一种运算分数—分数线分母一种数