我国最常见的恶性肿瘤是（）。 ["胃癌","肝癌","肺癌","肠癌","乳癌"]
有关盂买型的叙述，错误的是（） ["其红细胞不与抗A血清发生凝集反应","其红细胞不与抗B血清发生凝集反应","血清中含抗A","血清中含抗B","血清中无抗H"]
血液的比密（比重）正常参考范围是（） ["1.020～1.030","1.030～1.040","1.040～1.050","1.050～1.060","1.010～1.020"]
容易发生癌症人群是（）。 ["婴幼儿","儿童","青少年","中年","老年"]
在对恶性肿瘤初步判定时，下列症状中最有价值的线索是（）。 ["肿块","疼痛","溃疡","出血","梗阻"]
条件致病菌
