男，45岁，体检发现左下肺占位，CT检查如图，最可能的诊断为() ["A．左下肺结核球伴钙化","B．左下肺周围型肺癌伴钙化","C．左下肺错构瘤","D．左下肺炎性假瘤","E．左下肺感染"]
常鼓膜表面解剖标志包括() ["A．鼓膜脐","B．锤骨短突","C．锤纹","D．光锥","E．鼓膜钙化斑"]
男孩，27天。生后1周出现阻塞性黄疸，肝脾大，肝功能损害，并见角膜浑浊，反复惊厥，拟诊为半乳糖血症。下列哪项检查可确定诊断() ["A．裂隙灯可见角膜浑浊","B．Paigen细菌一吞噬法有细菌生长环形成","C．Beufler荧光法测定血中半乳糖-1-磷酸尿苷转移酶活性降低或缺失","D．气相色谱层析法检测尿中半乳糖阳性","E．检测皮肤成纤维细胞半乳糖-1-磷酸尿苷转移酶活性缺失"]
依据气化类型，乳突可分为() ["A．单纯型","B．气化型","C．板障型","D．硬化型","E．混合型"]
男孩10岁，系先天性睾丸发育不全综合征，其染色体检查除下列哪项外，均可为其核型表现() ["A．47xxy","B．46xy/47，xxy","C．48xxxy","D．49xxxxy","E．46xy"]
何谓pH值?
