风湿性心瓣膜病患者，胃肠镜检查前，如需预防心内膜感染，首选下列哪项措施预防肠球菌感染 ()
A. 肌注青霉素及链霉素
B. 口服羟氨苄青霉素和螺旋霉素
C. 口服红霉素和氟哌酸
D. 静注氨苄西林及肌注庆大霉素
E. 静注万古霉素及肌注青霉素
查看答案
阵发性室性心动过速首选 ()
A. 阿托品
B. 氯化钾
C. 苯妥英钠
D. 利多卡因
E. 普鲁卡因
下面哪个有利于鉴别室性心动过速和室上性心动过速 ()
A. 心室率160次/分
B. QRS波宽大畸形
C. 有室性早搏病史
D. 心脏增大
E. 心电图有心室融合波
Paragraph 4 __________. 查看材料
A. What causes autism？
B. How common is autism？
C. Does autism occur together with other disabilities？
D. What is Autism？
E. What kinds of jobs can individuals with autism do？
F. What is the difference between autism and mental retardation？
Individuals with autism are particularly weak at__________.
A. different techniques
B. social relationships and communication
C. language and information
D. several causes working together
E. a degree of repetition
F. skill development
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