小儿尿路感染最常见的致病菌是()
A.链球菌
B.肠球菌
C.肺炎球菌
D.大肠埃希菌
E.变形杆菌
参考答案:D
低压接户线与墙壁或构架的距离不应小于()
A、0.3m
B、15cm
C、0.2m
D、10m
A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from().
A.filling completely
B.developing free surface
C.developing free surface moment
D.collapsing