主动脉瓣狭窄的病例,当跨瓣压差达到以下哪项值有手术指征()
A.40mmHg
B.20mmHg
C.10mmHg
D.60mmHg
E.80mmHg
参考答案:D
Though he lost the race, he himself to be a good driver to the audience(观众).
A.became
B.proved
C.considered
D.found
香料烟以组织结构细致、稍细致者质量较好,组织疏松者质量较差。