Yao Ming’s basketball career _______ after years of hard work and now he is popular in the world.

A．took on

B．took off

C．took up

D．took out

基于以下病例：男性，60岁。慢支肺气肿病史20年，近２周来出现发热、咳嗽、咳大量粘液脓痰，伴心悸、气喘。查呼吸急促、发绀明显，颈静脉怒张、下肢浮肿。

做心电图检查时可出现（）

A、Ｐ波高尖

B、Ｐ波低平

C、Ｐ波倒置

D、Ｐ波增宽

E、Ｐ波消失