某人在过去的7年间,献血总量达5000 ml,此人快满50周岁,如果其身体一直保持健康状态,在他满55周岁以前,还可以争取无偿献血
A. 7次
B. 8次
C. 9次
D. 10次
E. 11次
解释旁观者介入和责任分散,并简述三种防止责任分散发生的途径。
女性,45岁,3年前于当地医院诊断为肺结核,间断HER治疗l年,自觉症状好转停药,未复查。半年后因病变进展改服HERZ治疗半年,查痰涂片抗酸杆菌()x3。治疗失败的原因最可能是
A. 原发单耐药
B. 继发性H耐药
C. 初始耐多药
D. 继发性R耐药
E. 继发性耐多药
What can be known from the fourth and fifth paragraphs?
A. Congress believed Arctic"s thermostat is upset by the global warming.
B. The aim of releasing a poll is to stress the bad influence of global warming.
C. Scientific organisations are responsible for studying global warming.
D. Fewer people think temperature rise is caused by human activities now.