Many people in China are ________ a “Hope Project”, helping poor children to get compulsory education．

A．taking on

B．taking out

C．working out

D．working on

有关治疗浓度利多卡因对心脏电生理的影响，错误的描述是

A．对正常心肌的电生理特性无明显影响
B．缩短普肯耶纤维和心室肌的APD
C．加快部分除极的心肌纤维的传导
D．减慢梗死区缺血的普肯耶纤维的传导
E．在细胞外低钾时可减慢传导