A business firm reduces the number of hours its employees work from 40 hours per week to 36 hours per week while continuing to pay the same amount of money. If an employee earned x dollars per hour before the reduction in hours, how much does he earn per hour under the new system ？（）

A.A

B.B

C.C

D.D

E.E

女，54岁，左胸前阵阵发性压榨性痛4月余就诊，Holter正常，行⁹⁹Tc^m-MIBI运动-静息心肌灌注显像如图，最可能的诊断为（）

A.左心室心尖梗死

B.左心室前间壁缺血

C.左心室无心肌缺血

D.左心室后壁缺血

E.左心室前侧壁缺血