小儿泌 * * 感染，临床以________和________为特征，常见的致病菌为________。
参考答案：细菌尿；白细胞尿；大肠杆菌
关于局部损失描述不正确的是（）。
A.局部损失常产生于流道断面突然扩大或缩小等部位
B.液体由于受到局部阻力，引起主流脱离边界形成涡流
C.由于形成涡流区使主流受到压缩，产生摩擦和碰撞
D.局部损失的发生，使得流体的机械能产生损失，使流体的总能量减少
An industrial economist is evaluating the supply and demand conditions for two different factors of production. Factor 1: The demand curve is derived from the resource’s marginal revenue product in the current period. Factor 2: The supply curve is perfectly inelastic and the price is determined by demand. Which of the following choices most likely identifies these two factors of productionFactor 1 Factor 2 （）①A. LaborNon-renewable resource ②B. Machinery Renewable resource ③C. Labor Renewable resource
A. ①
B. ②
C. ③
