According to the American law, parents must keep their kids _______ except when they are in school.

A．safety

B．company

C．friend

D．partner

CT增强扫描可诊断的大血管病变，不包括

A．肺动脉栓塞

B．主动脉瘤

C．夹层动脉瘤

D．主动脉闭锁不令

E．大血管畸形