A new system of quality control was ______ to overcome the defects in the firm’s products.

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问题 A new system of quality control was ______ to overcome the defects in the firm’s products.

选项 A、invested
B、installed
C、introduced
D、instructed

答案C

解析 动词辨义。invest意为“投资,投入”,如:invest money in business enterprise(投资于工商企业);install意为“安装,设置”,如:install a heating system(装暖气设备);introduce意为“引进,介绍”,如:introduce new techniques(采用新技术);instruct意为“讲授,指示”,如:instruct a class in history(给一个班学生上历史课)。根据句意可知,应选C)。
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