完形填空 阅读理解知识点总结（word）一、完形填空1．阅读下面短文，掌握大意, 然后从 A、B、C、D 四个选项中选出最佳选项
Do you know anything about the invention of the bar code（条形码）
A small food store owner found it was 1 to keep records of the product information
In 1948, he asked the Drexel Institute of Technology to solve this 2
Bernard Silver, a graduate student, was 3
He and his friend Norman Joseph Woodland 4 to work on it
5 , they invented their first working system
The system did work 6 , but it was very expensive and 7 the system didn't work well
If the invention was to become 8 in stores, the problems had to be solved
Finally, Woodland solved 9
The patent （专利权） for the bar code system was 10 for by Silver and Woodland in 1949, but the patent was not given until 1952
11 this patent was given, the system was still no
