人体皮下脂肪约占全身脂肪量的()。 ["10%","30%","50%","70%","90%"]
下列哪一个条件最适合于病毒的长期保存?() ["-20℃冰箱","-4℃冰箱","冷冻干燥","-70℃冰箱","50%甘油盐水"]
女性,26岁,原有室间隔缺损,2周来持续高热,心悸、胸闷、气短,左上腹疼痛,血尿,皮肤、眼结膜有出血点。血培养报告有草绿色链球菌生长,对青霉素敏感,治疗后病人体温恢复正常,心衰难以控制,此时宜采用何种措施() ["A.体外反搏","主动脉内气囊反搏","安装心脏起搏器","择期手术治疗","经皮瓣膜球囊成形术"]
我国规定以谷物为原料的白酒中甲醇含量每100mL应()。 ["≤0.02g","≤0.04g","≤0.12g","≤0.2g","≤0.4g"]
内源性基因结构突变发生在生殖细胞可引起()。 ["心血管疾病","传染病","肿瘤","遗传病","高血压"]
我国第一部著录甲骨文的著作是刘鹗的()