18，4，12，9，9，20，()，43 ["A．8","B．11","C．30","D．9"]
11，17，()，31，41，47 ["19","23","27","29"]
-1，0，31，80，63，()，5 ["A．35","B．24","C．26","D．37"]
体外循环机的主要部件是 ["血泵","氧气器","滤血器","变温器","血气分析仪"]
20岁，男，左胸痛伴压迫感，咳嗽一个月，结合CT检查选出最可能的诊断 ["胸腺瘤","纵隔血肿","畸胎瘤","脂肪瘤","淋巴瘤"]
国内特准免费寄递的邮刊：包括义务兵免费信件、邮政公事、盲人读物和_____。(四级)
