女性尿毒症患者，30岁，出现胸痛，心包摩擦音。

由于未及时治疗，该患者出现大量心包积液，这时可出现的体征

A．心尖冲动增强

B．靴形心

C．开瓣音

D．烧瓶样心

E．S₁亢进

From her        expression, we know that she didn’t understand the meaning.

A．amazing

B．surprising

C．puzzled

D．satisfied