单选题 Silicon chips are reliable and cheap to produce in large numbers and are used them in computers, calculators, programmed household appliances, and most electronic applications.

【正确答案】 B

【答案解析】答案：B. used them: used 分析：use 的宾语重复 use sth in / use sth to do / use sth for doing sth, 宾语sth前置为被动语态，不能再重复。参考译文：硅芯片可以稳定大量生产，用于计算机，计算器，程序设定的家用电器，还有几乎所有电子仪器。