A.番泻苷AB.阿魏酸C.小檗碱D.单宁酸E.大黄素大黄泻下作用的主要有效成分是黄连抗菌作用的主要有效成分是
颅底骨折伴脑脊液漏时,为预防颅内感染,以下那些措施是错误的?
A. 嘱患者勿用力咳嗽、打喷嚏、擤鼻涕
B. 在鼻前庭、外耳道放无菌干棉球
C. 禁忌做腰穿
D. 严禁为鼻漏者从鼻腔吸痰或置胃管
E. 为预防感染,可用抗生素滴耳、鼻
The shocking news made me realize______ terrible problems we would face.
A. what
B. how
C. that
D. why
It was never clear ____ the man hadn't reported the accident sooner.
A. which
B. when
C. why
D. where