In a balanced scorecard system of performance measurement,which one of the following is most likely to be used as a measure of performance from the customer perspective?
A. Increase in size of product range
B. Percentage of customers making repeat orders
C. Number of orders won per sales representative
D. Speed of processing an order
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在晶体缺陷中,属于线缺陷的有( )
A. 空位
B. 位错
C. 晶界
D. 亚晶界
纯金属中主要的点缺陷是( )
A. 间隙原子
B. 空位
C. 异类原子
D. 晶界
晶体缺陷的共同之处都能使金属的强度、硬度提高。
A. 对
B. 错