单项选择题
While he does not say so directly, Dr. Taylor______that consumers assign value to products based on their perceptions of quality.（）
A．impliesB．examinesC．characterizesD．distinguishes
单项选择题 Please contact Jen Davis in the HR Department if you have any questions regarding the new overtime and vacation______.（）
单项选择题 (144)（）
单项选择题 Johnson’s paper ______three processes for generating hydrogen in fuel cells.（）
