单选题During recent years we have heard much about "race": how this race does certain things and that race believes certain things and so on. Yet, the (1) phenomenon of race consists of a few surface indications. We judge race usually (2) the coloring of the skin: a white race, a brown race, a yellow race and a black race. But (3) you were to remove the skin you could not (4) anything about the race to which the individual belonged. There is (5) in physical structure, the brain or the internal organs to (6) a difference. There are four types of blood. (7) types are found in every race, and no type is distinct to any race. Human brains are the (8) . No scientists could examine a brain and tell you the race to which the individual belonged. Brains win (9) in size, but this occurs within every race. (10) does size have anything to do with intelligence. The largest brain (11) examined belonged to a person of weak (12) . On the other hand, some of our most distinguished people have had (13) brains. Mental tests which are reasonably (14) show no differences in intelligence between races. High and low test results both can be recorded by different members of any race. (15) equal educational advantages, there will be no difference in average standings, either on account of race or geographical location. Individuals of every race (16) civilization to go backward or forward. Training and education can change the response of groups of people, (17) enable them to behave in a (18) way. The behavior and ideals of people change according to circumstances, but they can always go back or go on to something new (19) is better and higher than anything (20) the past.

单选题肾梗死一般不会导致

单选题下列肝细胞坏死的病变中，可以发生结节状再生的是

单选题关于DNA拓扑异构酶的叙述，下列哪项是错误的

单选题人类免疫缺陷病毒(HIV)属于

单选题血吸虫性肝硬化的病变特点是

单选题纤维肉瘤的主要诊断依据是

单选题下列不符合前列腺增生症的病理变化是

单选题牵张反射的反射弧不直接涉及

单选题对于血管内皮细胞无刺激作用的是

单选题下列属于原位癌的病变是

单选题下述有关前庭器官毛细胞功能特征的描述，恰当的是

单选题急性菌痢的病理学形态取决于

单选题嗜酸性粒细胞的功能有

单选题发生在同源序列间的重组称为

单选题不符合泡膜细胞瘤的描述是

单选题A．细动脉玻璃样变B．细动脉纤维化C．细动脉淀粉样变性D．细小动脉纤维素样坏死

单选题对于成纤维细胞增生无刺激作用的是

单选题血浆中水及溶质分子因静水压和(或)渗透压差异而通过毛细血管壁进入组织间液的过程称为

单选题从肾小球滤出的HCO 3 - 在近端小管重吸收的主要形式是(2007年，2012年)