43. What is stressed in the second paragraph?

A. The function of ultraviolet light, ink and a scanner.

B. The heavy work of store owners.

C. Bernard Silver’s education background.

D. The rise of barcodes.

44. Which of the following was NOT a disadvantage of Silver’s system?

A. It lacked a central mechanism.

B. The system was not stable.

C. It was a laborious process.

D. It was expensive to be applied on a large scale.

45. What is the purpose of the text?

A. To provide information about the development of barcodes.

B. To praise scientists’ efforts in making people’s lives easier.

C. To tell people that failure is the mother of success.

D. To describe shop owners’ opinions of barcodes.

编辑老师为大家整理了效实中学高二英语下学期期末考试题，希望对大家有所帮助。更多相关信息请继续关注高二英语试题栏目！