了解一下：厦门大学2020年考研成绩查询入口及查询方式

女性，42岁，售货员，右下肢静脉迂曲、扩张8年，长时间站立有小腿酸胀，轻度可凹性浮肿,近年来常有小腿皮肤瘙痒,色素沉着,检査Trendelenburg试验（+),Perthes试验（-）。初步诊断是
A.原发性下胺静脉曲张 B.原发性下肢深静脉瓣膜功能不全
C.下肢栓塞性浅静脉炎 D.周围型下肢深静脉血栓形成

Though not biologically related,friends are as“related”as fourth cousins,sharing about 1%of genes.That is_（1）_a study,published from the University of California and Yale University in the Proceedings of the National Academy of Sciences,has__（2）_.The study is a genome-wide analysis conducted_（3）__1,932 unique subjects which__（4）__pairs of unrelated friends and unrelated strangers.The same people were used in both_（5）_.While 1%may seem_（6）_,it is not so to a geneticist.As James Fowler,professor of medical genetics at UC San Diego,says,“Most people do not even_（7）_their fourth cousins but somehow manage to select as friends the people who_（8）_our kin.”The study_（9）_found that the genes for smell were something shared in friends but not genes for immunity.Why this similarity exists in smell genes is difficult to explain,for now,_（10）_,as the team suggests,it draws us to similar environments but there is more_（11）_it.There could be many mechanisms working together that_（12）_us in choosing genetically similar friends_（13）_”functional Kinship”of being friends with_（14）_!One of the remarkable findings of the study was the similar genes seem to be evolution_（15）_than other genes Studying this could help_（16）_why human evolution picked pace in the last 30,000 years,with social environment being a major_（17）_factor.The findings do not simply explain people’s_（18）_to befriend those of similar_（19）_backgrounds,say the researchers.Though all the subjects were drawn from a population of European extraction,care was taken to_（20）_that all subjects,friends and strangers,were taken from the same population.
7选？

A.visit
B.miss
C.seek
D.know

有关肺顺应性的叙述，正确的是

A.与肺的弹性阻力呈正变关系
B.不易扩张的肺，顺应性小
C.表示肺在外力作用下的可扩展性
D.肺泡表面活性物质减少时增加

关于蛋白质分子三级结构的描述，其中错误的是

A.具有三级结构的多肽链都具有生物学活性
B.天然蛋白质分子均有这种结构
C.三级结构的稳定性主要由次级键维系
D.亲水基团多聚集在三级结构的表面