不定项选择

A．正确
B．错误
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The human resources department has offered to undertake some research to help Mylo to predict the number of employees who will require lunch in the cafeteria each day. This information will allow Mylo to prepare an accurate number of lunches each day. What is the maximum amount which Mylo would be willing to pay for this information (to the nearest whole 191 B、478 D、$175
单项选择题
下列化合物中亲电取代反应最不活泼的是（ ) A. B. C. D.
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