试题与答案

患者男,20岁,因“关节畸形,常发关节出血”来诊。患者自幼易发生出血,学步前以软组织

题型:单项选择题 共用题干题

题目:

患者男,20岁,因“关节畸形,常发关节出血”来诊。患者自幼易发生出血,学步前以软组织出血多见,开始走路后经常发生关节出血,现有关节畸形。实验室检查:活化部分凝血酶时间(APTT)延长,血浆凝血酶原时间(PT)和血浆凝血酶时间(TT)以及纤维蛋白原正常,血小板计数和功能正常,凝血因子Ⅷ活性(FⅧ:C)3%,血管性血友病因子抗原(VWF:Ag)等检查正常。确诊为血友病A。

该患者所属血友病A的类型是()

A.重型

B.中型

C.轻型

D.普通型

E.无法判断

答案:

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参考答案:C解析:“耶克斯一多德森定律”表明动机不足或过分强烈都会影响学习效率。(1)动机的最佳水平随任务性质的不同而不同。在比较容易的任务中,学习效率随动机的提高而上升;随着任务难度的增加,动机的...

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