下列何药是气性坏疽的首选药：
A．头孢氨苄B．阿莫西林C．利福平D．青霉素E．米诺环素
参考答案：D
Tom's mother is ill. Now she stays ______. [ ]
A. in hospital
B. in the hospital
C. at hospital
D. at the hospital
男性患者，52岁，高热，咳嗽、咳黄痰，查体：口唇发绀，右下肺可闻及支气管呼吸音，该患者的发绀属于
A．肺性发绀
B．心性混合性发绀
C．淤血性周围性发绀
D．缺血性周围性发绀
E．混合性发绀
