男性,72岁。因"反复头晕1个月"入院,无冠心病、糖尿病、高血压病史。入院血压110/60mmHg。血压动态心电图示窦性心动过缓,最慢心室率28/分钟,P-R间期为0.28秒。患者术后3天出现发热,血常规示白细胞12×10/L,中性粒细胞0.85。囊袋出现红肿热痛。考虑患者出现并发症为()
A. 囊袋血肿
B. 囊袋感染
C. 电极脱位
D. 肺部感染
E. 胸膜炎
男性,20岁,持续发热半个月,体温37~40℃,晚上为甚,早晨正常,稍畏寒,无寒战,间有腹痛,大便稀,2~3次/天,无脓血,精神、食欲尚可。查体:肝剑突下4cm,轻触痛,脾侧位可及。血象:Hb120g/L,WBC18×109/L,N0.50,L0.30,E0.20。作为发热的原因,可能性最小的是()
A. 急性血吸虫病
B. 结核
C. 伤寒
D. 肝脓肿
E. 病毒性肝炎
冷却液测量仪可显示冷却液的()。
A. 比重
B. 浓度
C. 低温安全使用温度
D. 以上都是
When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?()
A. The six-way valve opens
B. The steering service pump motor is stopped
C. The follow-up gear takes the pump off stroke
D. The cylinder relief valves bypass oil to the suction side the pum