下列哪项对诊断急性肾小球肾炎最有价值
A．血沉增快
B．抗"O"增高
C．尿沉渣可见红细胞管型
D．下降
E．蛋白尿
参考答案：C
— _____ does your mother go for a walk?
— Every afternoon. [ ]
A. How long
B. How much
C. How often
D. How many
事故救援预案演练主要有（）几种方式。
A.分级演习
B.单项演习
C.组合演习
D.全面演习
