微分方程y’+y/x=2满足初始条件的特解是()。 A.x-1/x B.x+1/x 发布时间:2017-05-16 18:03 │ 来源:www.tikuol.com 题型:单项选择题 问题: 微分方程y’+y/x=2满足初始条件的特解是()。A.x-1/xB.x+1/xC.x+c/x(c为任意常数)D.x+2/x
题型:单项选择题 He ___articles for our wall-newspaper these three years, and he ___about forty articles. A.has been writing; has written B.has been writing; wrote C.is writing; has been writing D.has written; has written 查看答案
题型:单项选择题 男性,48岁,患尿毒症行维持性腹膜透析5年,行标准(2APE)方案,每天换腹透液4次,其中1.5%2000ml×3次,4.25%2000ml×1次,无明显不适症状且一直上班工作。近2天患者诉腹痛伴恶心,且放出腹透液浑浊最可能是().A.腹膜功能衰竭B.腹膜粘连C.透析液质量有问题D.腹膜感染E.急性胃炎 查看答案