______ , a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor.

A．Other things being equal

B．To be equal in other things

C．Were other things equal

D．Other things to be equal

心绞痛时首选（）

A．皮下或肌内注射吗啡

B．输液

C．祛痰

D．镇咳

E．舌下含化硝酸甘油