第1题: [单项选择]Many manufacturers were accused of concentrating too heavily on cost reduction, often at the ______ of the quality of their products. A. expansion B. exposure C. expense D. expectation 参考答案:C 答案解析:[解析] 很多制造商都受到谴责,说他们过度注重降低成本而以产品的质量为代价。 [解析] 考查名词辨析。expense表示“价钱,花费;(pl.)开支”,意为“由……付费;以……为代价”,