单选题 In this factory the machines are not regulated______but are jointly controlled by. a central computer system.

【正确答案】 B

【答案解析】[解析] B项individually意为“单独地”，与后面的jointly相呼应；A项independ- ently意为“独立地”；C项irrespectively意为“不顾一切地”；D项irregulariy意为“不定期地；不规则地”。